diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcApp.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcApp.java
index 71440a8..a7d273e 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcApp.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcApp.java
@@ -1,8 +1,11 @@
 package org.nanoboot.utils.timecalc.app;
 
-import org.nanoboot.utils.timecalc.utils.Constants;
-import org.nanoboot.utils.timecalc.utils.FileConstants;
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.entity.Visibility;
+import org.nanoboot.utils.timecalc.utils.common.Constants;
+import org.nanoboot.utils.timecalc.utils.common.FileConstants;
+import org.nanoboot.utils.timecalc.utils.property.ReadOnlyProperty;
+import org.nanoboot.utils.timecalc.utils.property.StringProperty;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import javax.swing.JOptionPane;
 import java.io.IOException;
@@ -14,6 +17,8 @@ import java.io.IOException;
 public class TimeCalcApp {
 
     private long startNanoTime = 0l;
+    private StringProperty visibilityReadWriteProperty = new StringProperty(Visibility.STRONGLY_COLORED.name());
+    public ReadOnlyProperty<String> visibilityProperty = visibilityReadWriteProperty.asReadOnlyProperty();
 
     public void start(String[] args) throws IOException {
 
@@ -60,7 +65,7 @@ public class TimeCalcApp {
             Utils.writeTextToFile(FileConstants.OVERTIME_TXT, newOvertime);
             try {
                 TimeCalcManager timeCalc =
-                        new TimeCalcManager(newStartTime, newOvertime);
+                        new TimeCalcManager(newStartTime, newOvertime, this);
             } catch (Exception e) {
                 JOptionPane.showMessageDialog(null, "Error: " + e.getMessage(),
                         e.getMessage(), JOptionPane.ERROR_MESSAGE);
@@ -77,10 +82,11 @@ public class TimeCalcApp {
     }
     public long getCountOfMillisecondsSinceAppStarted() {
         if(startNanoTime == 0l) {
-            throw new TimeCalcException("App was not yet started.");
+            throw new TimeCalcException("TimeCalcApp was not yet started.");
         }
         return System.nanoTime() - startNanoTime;
     }
 
 }
 
+
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcManager.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcManager.java
index 098d123..a4531d7 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcManager.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcManager.java
@@ -15,11 +15,11 @@ import org.nanoboot.utils.timecalc.swing.progress.ProgressCircle;
 import org.nanoboot.utils.timecalc.swing.progress.ProgressSquare;
 import org.nanoboot.utils.timecalc.swing.progress.WalkingHumanProgressAsciiArt;
 import org.nanoboot.utils.timecalc.swing.progress.WeekBattery;
-import org.nanoboot.utils.timecalc.utils.Constants;
-import org.nanoboot.utils.timecalc.utils.DateFormats;
-import org.nanoboot.utils.timecalc.utils.Jokes;
-import org.nanoboot.utils.timecalc.utils.TimeHM;
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.common.Constants;
+import org.nanoboot.utils.timecalc.utils.common.DateFormats;
+import org.nanoboot.utils.timecalc.utils.common.Jokes;
+import org.nanoboot.utils.timecalc.utils.common.TimeHM;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import javax.swing.JOptionPane;
 import java.awt.Color;
@@ -48,10 +48,12 @@ public class TimeCalcManager {
     private final TimeHM startTime;
     private final TimeHM overtime;
     private final TimeHM endTime;
+    private final TimeCalcApp timeCalcApp;
     private boolean stopBeforeEnd = false;
-    private boolean vtipyShown = false;
 
-    public TimeCalcManager(String startTimeIn, String overTimeIn) {
+    public TimeCalcManager(String startTimeIn, String overTimeIn,
+            TimeCalcApp timeCalcApp) {
+        this.timeCalcApp = timeCalcApp;
         Utils.everythingHidden
                 .setValue(TimeCalcConf.getInstance().isEverythingHidden());
         Utils.toastsAreEnabled
@@ -189,7 +191,7 @@ public class TimeCalcManager {
                             break;
                         case "uptime":
                             JOptionPane.showMessageDialog(null,
-                                    Utils.getCountOfMinutesSinceAppStarted()
+                                    timeCalcApp.getCountOfMinutesSinceAppStarted()
                                     + " minutes");
                             break;
                         case "toast":
@@ -407,10 +409,6 @@ public class TimeCalcManager {
             double totalSecondsRemainsDouble =
                     ((double) totalMillisecondsRemains) / 1000;
 
-            if (timeRemains.getHour() == 0 && timeRemains.getMinute() == 1 && !vtipyShown) {
-                vtipyShown = true;
-                Jokes.showRandom();
-            }
 //            if (timeRemains.getHour() == 0 && timeRemains.getMinute() <= 3) {
 //                Utils.highlighted.set(true);
 //                walkingHumanProgressAsciiArt.setForeground(Color.BLUE);
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/AboutButton.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/AboutButton.java
index 43f1c1d..3ed979d 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/AboutButton.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/AboutButton.java
@@ -1,7 +1,6 @@
 package org.nanoboot.utils.timecalc.swing.common;
 
-import org.nanoboot.utils.timecalc.swing.common.TimeCalcButton;
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import javax.swing.JOptionPane;
 
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Toaster.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Toaster.java
index 4aa168a..eb85659 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Toaster.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Toaster.java
@@ -31,7 +31,7 @@ package org.nanoboot.utils.timecalc.swing.common;
  * }
  */
 
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import javax.swing.BorderFactory;
 import javax.swing.Icon;
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/WeatherWindow.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/WeatherWindow.java
index aac468d..752c6c7 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/WeatherWindow.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/WeatherWindow.java
@@ -1,6 +1,6 @@
 package org.nanoboot.utils.timecalc.swing.common;
 
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import javax.swing.JEditorPane;
 import javax.swing.JFrame;
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Widget.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Widget.java
index 0bcb5ea..37c42ef 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Widget.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Widget.java
@@ -1,12 +1,21 @@
 package org.nanoboot.utils.timecalc.swing.common;
 
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.app.TimeCalcConf;
+import org.nanoboot.utils.timecalc.entity.Visibility;
+import org.nanoboot.utils.timecalc.utils.common.TimeHM;
+import org.nanoboot.utils.timecalc.utils.property.StringProperty;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import javax.swing.JPanel;
 import javax.swing.Timer;
 import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.RenderingHints;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
 
 /**
  * @author Robert
@@ -20,6 +29,8 @@ public class Widget extends JPanel {
     protected double donePercent = 0;
     protected boolean mouseOver = false;
 
+    public StringProperty visibilityProperty = new StringProperty(Visibility.STRONGLY_COLORED.name());
+
     public Widget() {
         setBackground(BACKGROUND_COLOR);
         new Timer(getTimerDelay(), e -> repaint()).start();
@@ -68,4 +79,16 @@ public class Widget extends JPanel {
     public void setBounds(int x, int y, int side) {
         setBounds(x, y, side, side);
     }
+
+    @Override
+    public final void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        Visibility visibility = Visibility.valueOf(visibilityProperty.getValue());
+        this.setVisible(visibility != Visibility.NONE);
+        paintWidget(g);
+
+    }
+
+    protected void paintWidget(Graphics g) {
+    }
 }
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/AnalogClock.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/AnalogClock.java
index 8509a18..764ffd0 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/AnalogClock.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/AnalogClock.java
@@ -1,10 +1,11 @@
 package org.nanoboot.utils.timecalc.swing.progress;
 
+import org.nanoboot.utils.timecalc.entity.Visibility;
 import org.nanoboot.utils.timecalc.swing.common.Widget;
 import org.nanoboot.utils.timecalc.app.TimeCalcConf;
-import org.nanoboot.utils.timecalc.utils.DateFormats;
-import org.nanoboot.utils.timecalc.utils.TimeHM;
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.common.DateFormats;
+import org.nanoboot.utils.timecalc.utils.common.TimeHM;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import javax.swing.JFrame;
 import java.awt.BasicStroke;
@@ -75,8 +76,9 @@ public class AnalogClock extends Widget {
     }
 
     @Override
-    public void paintComponent(Graphics g) {
+    public void paintWidget(Graphics g) {
         super.paintComponent(g);
+        Visibility visibility = Visibility.valueOf(visibilityProperty.getValue());
         Graphics2D g2d = (Graphics2D) g;
         g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                 RenderingHints.VALUE_ANTIALIAS_ON);
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/Battery.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/Battery.java
index 118ec2f..dc0ba70 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/Battery.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/Battery.java
@@ -3,9 +3,9 @@ package org.nanoboot.utils.timecalc.swing.progress;
 import lombok.Getter;
 import org.nanoboot.utils.timecalc.swing.common.Widget;
 import org.nanoboot.utils.timecalc.app.TimeCalcConf;
-import org.nanoboot.utils.timecalc.utils.BooleanProperty;
-import org.nanoboot.utils.timecalc.utils.NumberFormats;
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.property.BooleanProperty;
+import org.nanoboot.utils.timecalc.utils.common.NumberFormats;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import java.awt.Color;
 import java.awt.Dimension;
@@ -52,7 +52,7 @@ public class Battery extends Widget {
     }
 
     @Override
-    public void paintComponent(Graphics g) {
+    public void paintWidget(Graphics g) {
         if (totalHeight == 0) {
             this.totalHeight = (int) (this.getHeight() / 10d * 7d);
             this.totalWidth = this.getWidth();
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/HourBattery.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/HourBattery.java
index 84a926d..dc3dbd6 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/HourBattery.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/HourBattery.java
@@ -1,6 +1,6 @@
 package org.nanoboot.utils.timecalc.swing.progress;
 
-import org.nanoboot.utils.timecalc.utils.TimeHM;
+import org.nanoboot.utils.timecalc.utils.common.TimeHM;
 
 /**
  * @author Robert
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/ProgressCircle.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/ProgressCircle.java
index e3eaad8..d6c3bab 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/ProgressCircle.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/ProgressCircle.java
@@ -1,8 +1,8 @@
 package org.nanoboot.utils.timecalc.swing.progress;
 
 import org.nanoboot.utils.timecalc.swing.common.Widget;
-import org.nanoboot.utils.timecalc.utils.NumberFormats;
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.common.NumberFormats;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import java.awt.Color;
 import java.awt.Dimension;
@@ -17,7 +17,7 @@ public class ProgressCircle extends Widget {
     }
 
     @Override
-    public void paintComponent(Graphics g) {
+    public void paintWidget(Graphics g) {
         if (side == 0) {
             this.side = Math.min(getWidth(), getHeight());
         }
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/ProgressSquare.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/ProgressSquare.java
index d4aaab9..3f9c365 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/ProgressSquare.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/ProgressSquare.java
@@ -1,8 +1,8 @@
 package org.nanoboot.utils.timecalc.swing.progress;
 
 import org.nanoboot.utils.timecalc.swing.common.Widget;
-import org.nanoboot.utils.timecalc.utils.NumberFormats;
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.common.NumberFormats;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import java.awt.Color;
 import java.awt.Dimension;
@@ -19,7 +19,7 @@ public class ProgressSquare extends Widget {
     }
 
     @Override
-    public void paintComponent(Graphics g) {
+    public void paintWidget(Graphics g) {
         if (side == 0) {
             this.side = Math.min(getWidth(), getHeight());
             this.square = side * side;
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/WalkingHumanProgressAsciiArt.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/WalkingHumanProgressAsciiArt.java
index e1ed6b0..2db826e 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/WalkingHumanProgressAsciiArt.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/progress/WalkingHumanProgressAsciiArt.java
@@ -1,10 +1,10 @@
 package org.nanoboot.utils.timecalc.swing.progress;
 
 import org.nanoboot.utils.timecalc.swing.common.Toaster;
-import org.nanoboot.utils.timecalc.utils.Constants;
-import org.nanoboot.utils.timecalc.utils.NumberFormats;
-import org.nanoboot.utils.timecalc.utils.TimeHM;
-import org.nanoboot.utils.timecalc.utils.Utils;
+import org.nanoboot.utils.timecalc.utils.common.Constants;
+import org.nanoboot.utils.timecalc.utils.common.NumberFormats;
+import org.nanoboot.utils.timecalc.utils.common.TimeHM;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
 
 import javax.imageio.ImageIO;
 import javax.swing.ImageIcon;
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Property.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Property.java
deleted file mode 100644
index c55ee4e..0000000
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Property.java
+++ /dev/null
@@ -1,16 +0,0 @@
-package org.nanoboot.utils.timecalc.utils;
-
-import lombok.Getter;
-import lombok.Setter;
-
-/**
- * @author Robert
- * @since 23.02.2024
- */
-public class Property <T>{
-    @Getter @Setter
-    private T value;
-    public Property(T valueIn) {
-        this.value = valueIn;
-    }
-}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/binding/NumberBinding.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/binding/NumberBinding.java
new file mode 100644
index 0000000..17be7fd
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/binding/NumberBinding.java
@@ -0,0 +1,8 @@
+package org.nanoboot.utils.timecalc.utils.binding;
+
+/**
+ * @author Robert
+ * @since 23.02.2024
+ */
+public class NumberBinding {
+}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Constants.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Constants.java
similarity index 85%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Constants.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Constants.java
index 85023fe..1c314ca 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Constants.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Constants.java
@@ -1,7 +1,7 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 21.02.2024
  */
 public class Constants {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/DateFormats.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/DateFormats.java
similarity index 90%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/DateFormats.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/DateFormats.java
index 67c2752..37bbda4 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/DateFormats.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/DateFormats.java
@@ -1,4 +1,4 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
@@ -6,7 +6,7 @@ import java.time.format.DateTimeFormatter;
 import java.util.Locale;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 21.02.2024
  */
 public class DateFormats {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/FileConstants.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/FileConstants.java
similarity index 84%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/FileConstants.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/FileConstants.java
index 2a07a05..fe173dc 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/FileConstants.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/FileConstants.java
@@ -1,9 +1,9 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 import java.io.File;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 21.02.2024
  */
 public class FileConstants {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/HttpProxy.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/HttpProxy.java
similarity index 94%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/HttpProxy.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/HttpProxy.java
index ab8978f..52e4488 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/HttpProxy.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/HttpProxy.java
@@ -1,10 +1,10 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 import java.io.File;
 import java.io.IOException;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 16.02.2024
  */
 public class HttpProxy {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Jokes.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Jokes.java
similarity index 97%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Jokes.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Jokes.java
index 58712b3..b7c929d 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Jokes.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Jokes.java
@@ -1,4 +1,4 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 import org.nanoboot.utils.timecalc.swing.common.Toaster;
 import org.nanoboot.utils.timecalc.app.TimeCalcConf;
@@ -13,7 +13,7 @@ import java.util.HashSet;
 import java.util.Set;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 09.02.2024
  */
 public class Jokes {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/JokesTxt.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/JokesTxt.java
similarity index 92%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/JokesTxt.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/JokesTxt.java
index f77faba..7735103 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/JokesTxt.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/JokesTxt.java
@@ -1,4 +1,4 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -7,7 +7,7 @@ import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 15.02.2024
  */
 public class JokesTxt {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/NumberFormats.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/NumberFormats.java
similarity index 89%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/NumberFormats.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/NumberFormats.java
index f86a4fa..896255a 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/NumberFormats.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/NumberFormats.java
@@ -1,10 +1,10 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 21.02.2024
  */
 public class NumberFormats {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/TimeHM.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/TimeHM.java
similarity index 95%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/TimeHM.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/TimeHM.java
index fde210a..cabfd9c 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/TimeHM.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/TimeHM.java
@@ -1,10 +1,10 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 import lombok.Getter;
 import lombok.Setter;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 21.02.2024
  */
 public class TimeHM {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Utils.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Utils.java
similarity index 96%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Utils.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Utils.java
index b661659..4e60051 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/Utils.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/common/Utils.java
@@ -1,6 +1,7 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.common;
 
 import org.nanoboot.utils.timecalc.app.Main;
+import org.nanoboot.utils.timecalc.utils.property.BooleanProperty;
 
 import java.awt.Color;
 import java.io.File;
@@ -14,7 +15,7 @@ import java.util.jar.Attributes;
 import java.util.jar.Manifest;
 
 /**
- * @author pc00289
+ * @author Robert
  * @since 15.02.2024
  */
 public class Utils {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/BooleanProperty.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/BooleanProperty.java
similarity index 93%
rename from modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/BooleanProperty.java
rename to modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/BooleanProperty.java
index 448297e..281cd65 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/BooleanProperty.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/BooleanProperty.java
@@ -1,4 +1,4 @@
-package org.nanoboot.utils.timecalc.utils;
+package org.nanoboot.utils.timecalc.utils.property;
 
 /**
  * @author Robert
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/BooleanReadOnlyProperty.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/BooleanReadOnlyProperty.java
new file mode 100644
index 0000000..3989d82
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/BooleanReadOnlyProperty.java
@@ -0,0 +1,23 @@
+package org.nanoboot.utils.timecalc.utils.property;
+
+/**
+ * @author Robert
+ * @since 16.02.2024
+ */
+public class BooleanReadOnlyProperty extends ReadOnlyProperty<Boolean> {
+
+    public BooleanReadOnlyProperty(Boolean valueIn) {
+        super(valueIn);
+    }
+    public BooleanReadOnlyProperty(Property<Boolean> property) {
+        super(property);
+    }
+
+    public boolean isEnabled() {
+        return getValue();
+    }
+    public boolean isDisabled() {
+        return !getValue();
+    }
+
+}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/Property.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/Property.java
new file mode 100644
index 0000000..8e9aee6
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/Property.java
@@ -0,0 +1,49 @@
+package org.nanoboot.utils.timecalc.utils.property;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.nanoboot.utils.timecalc.app.TimeCalcException;
+import org.nanoboot.utils.timecalc.utils.property.ReadOnlyProperty;
+import org.nanoboot.utils.timecalc.utils.property.WriteOnlyProperty;
+
+/**
+ * @author Robert
+ * @since 23.02.2024
+ */
+public class Property <T>{
+    private T value;
+    private Property<T> boundToProperty = null;
+    public Property(T valueIn) {
+        this.value = valueIn;
+    }
+    public ReadOnlyProperty<T> asReadOnlyProperty() {
+        return new ReadOnlyProperty<>(this);
+    }
+    public WriteOnlyProperty<T> asWriteOnlyProperty() {
+        return new WriteOnlyProperty<>(this);
+    }
+    public boolean isBound() {
+        return boundToProperty != null;
+    }
+    public void unBound() {
+        if(!isBound()) {
+            throw new TimeCalcException("No bound property");
+        }
+        this.value = boundToProperty.value;
+        this.boundToProperty = null;
+    }
+    public void bindTo(Property<T> anotherProperty) {
+        this.boundToProperty = anotherProperty;
+    }
+    public T getValue() {
+        return isBound() ? this.boundToProperty.getValue() : value;
+    }
+
+    public void setValue(T value) {
+        if(isBound()) {
+            throw new TimeCalcException("Cannot set value, because property is bound.");
+        } else {
+            this.value = value;
+        }
+    }
+}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/PropertyWrapper.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/PropertyWrapper.java
new file mode 100644
index 0000000..c16ebcd
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/PropertyWrapper.java
@@ -0,0 +1,19 @@
+package org.nanoboot.utils.timecalc.utils.property;
+
+import org.nanoboot.utils.timecalc.app.TimeCalcException;
+
+/**
+ * @author Robert
+ * @since 23.02.2024
+ */
+public class PropertyWrapper <T> {
+    private Property<T> innerProperty;
+
+    public final void unBound() {
+        throw new TimeCalcException("This is a write only property. Unbounding is forbiden.");
+    }
+    public final void bindTo(Property<T> anotherProperty) {
+        throw new TimeCalcException("This is a write only property. Bounding to another property is forbiden.");
+    }
+
+}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/ReadOnlyProperty.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/ReadOnlyProperty.java
new file mode 100644
index 0000000..36a6013
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/ReadOnlyProperty.java
@@ -0,0 +1,33 @@
+package org.nanoboot.utils.timecalc.utils.property;
+
+import org.nanoboot.utils.timecalc.app.TimeCalcException;
+
+/**
+ * @author Robert
+ * @since 23.02.2024
+ */
+public class ReadOnlyProperty<T> extends Property<T> {
+    private Property<T> innerProperty;
+    public ReadOnlyProperty(T valueIn) {
+        super(valueIn);
+        throw new TimeCalcException("This constructor is forbidden in class " + getClass().getName() + ".");
+    }
+    public ReadOnlyProperty(Property<T> property) {
+        super(null);
+        this.innerProperty = property;
+    }
+    public final void setValue(T valueIn) {
+        throw new TimeCalcException("This is a read only property. New value cannot be set.");
+    }
+
+    public final T getValue(T valueIn) {
+        return innerProperty.getValue();
+    }
+    public final void unBound() {
+        throw new TimeCalcException("This is a write only property. Unbounding is forbiden.");
+    }
+    public final void bindTo(Property<T> anotherProperty) {
+        throw new TimeCalcException("This is a write only property. Bounding to another property is forbiden.");
+    }
+
+}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/StringProperty.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/StringProperty.java
new file mode 100644
index 0000000..2ce6618
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/StringProperty.java
@@ -0,0 +1,16 @@
+package org.nanoboot.utils.timecalc.utils.property;
+
+/**
+ * @author Robert
+ * @since 16.02.2024
+ */
+public class StringProperty extends Property<String> {
+
+    public StringProperty(String valueIn) {
+        super(valueIn);
+    }
+
+    public StringProperty() {
+        this("");
+    }
+}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/StringReadOnlyProperty.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/StringReadOnlyProperty.java
new file mode 100644
index 0000000..2f13b77
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/StringReadOnlyProperty.java
@@ -0,0 +1,15 @@
+package org.nanoboot.utils.timecalc.utils.property;
+
+/**
+ * @author Robert
+ * @since 16.02.2024
+ */
+public class StringReadOnlyProperty extends ReadOnlyProperty<String> {
+
+    public StringReadOnlyProperty(String valueIn) {
+        super(valueIn);
+    }
+    public StringReadOnlyProperty(Property<String> property) {
+        super(property);
+    }
+}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/WriteOnlyProperty.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/WriteOnlyProperty.java
new file mode 100644
index 0000000..a9f7a30
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/utils/property/WriteOnlyProperty.java
@@ -0,0 +1,34 @@
+package org.nanoboot.utils.timecalc.utils.property;
+
+import org.nanoboot.utils.timecalc.app.TimeCalcException;
+
+/**
+ * @author Robert
+ * @since 23.02.2024
+ */
+public class WriteOnlyProperty<T> extends Property<T> {
+    private Property<T> innerProperty;
+    public WriteOnlyProperty(T valueIn) {
+        super(valueIn);
+        throw new TimeCalcException("This constructor is forbidden in class " + getClass().getName() + ".");
+    }
+    public WriteOnlyProperty(Property<T> property) {
+        super(null);
+        this.innerProperty = property;
+    }
+    public final void setValue(T valueIn) {
+        this.innerProperty.setValue(valueIn);
+    }
+
+    public final T getValue(T valueIn) {
+        throw new TimeCalcException("This is a write only property. Current value cannot be read.");
+    }
+    public final void unBound() {
+        throw new TimeCalcException("This is a write only property. Unbounding is forbiden.");
+    }
+    public final void bindTo(Property<T> anotherProperty) {
+        throw new TimeCalcException("This is a write only property. Bounding to another property is forbiden.");
+    }
+
+
+}
diff --git a/timecalc.conf b/timecalc.conf
index 9db3996..fbd79c4 100644
--- a/timecalc.conf
+++ b/timecalc.conf
@@ -2,4 +2,5 @@ clock.colorful=false
 clock.hands.long=true
 jokes.visible=true
 battery.waves.enabled=true
-everything-hidden=false
\ No newline at end of file
+everything-hidden=false
+default-visibility=STRONGLY_COLORED
\ No newline at end of file