diff --git a/resources/image/back-disco.png b/resources/image/back-disco.png
new file mode 100644
index 0000000..bccfdf4
Binary files /dev/null and b/resources/image/back-disco.png differ
diff --git a/src/blupi.cxx b/src/blupi.cxx
index 04d8358..62e88ef 100644
--- a/src/blupi.cxx
+++ b/src/blupi.cxx
@@ -901,6 +901,13 @@ DoInit (int argc, char * argv[], bool & exit)
   if (!g_pPixmap->Cache (CHBACKWIN, "image/back-win.png", totalDim, iconDim))
     return EXIT_FAILURE;
 
+  totalDim.x = LXLOGIC ();
+  totalDim.y = LYLOGIC ();
+  iconDim.x  = 0;
+  iconDim.y  = 0;
+  if (!g_pPixmap->Cache (CHBACKWIN0, "image/back-disco.png", totalDim, iconDim))
+    return EXIT_FAILURE;
+
   totalDim.x = LXLOGIC ();
   totalDim.y = LYLOGIC ();
   iconDim.x  = 0;
diff --git a/src/def.h b/src/def.h
index 4914071..23fcda6 100644
--- a/src/def.h
+++ b/src/def.h
@@ -93,6 +93,7 @@
 #define CHBACKWIN       22
 #define CHBACKLOST      23
 #define CHBACKTITLE     24
+#define CHBACKWIN0      25
 
 #define MAX_PRIVATE_MISSIONS 20
 
diff --git a/src/event.cxx b/src/event.cxx
index fedc27f..00d2a36 100644
--- a/src/event.cxx
+++ b/src/event.cxx
@@ -3312,16 +3312,36 @@ CEvent::ChangePhase (Uint32 phase)
   m_phase = phase; // change phase
   m_index = index;
 
+  auto backWide = table[m_index].chBackWide;
+
   filename = table[m_index].backName;
   if (filename.find ("%.3d") != std::string::npos)
-    filename = string_format (table[m_index].backName, GetImageWorld ());
+  {
+    auto id  = GetImageWorld ();
+    filename = string_format (table[m_index].backName, id);
+
+    if (table[m_index].phase == EV_PHASE_LASTWIN)
+    {
+      switch (id)
+      {
+      case 0:
+        backWide = CHBACKWIN0;
+        break;
+      case 1:
+        // backWide = CHBACKWIN1;
+        break;
+      case 2:
+        backWide = CHBACKWIN;
+        break;
+      }
+    }
+  }
   totalDim.x = LXLOGIC ();
   totalDim.y = LYLOGIC ();
   iconDim.x  = 0;
   iconDim.y  = 0;
   if (!m_pPixmap->Cache (
-        CHBACK, filename, totalDim, iconDim, table[m_index].mode,
-        table[m_index].chBackWide))
+        CHBACK, filename, totalDim, iconDim, table[m_index].mode, backWide))
   {
     WaitMouse (false);
     m_tryInsertCount = 40;