         "    .    " +
         "    .    " +
         "    .    " +
-        "         ")
-    
-    public static let playMatrix = NuimoLEDMatrix(string:
+        "         ")}
+    
+    public static var playMatrix: NuimoLEDMatrix {return NuimoLEDMatrix(string:
         "         " +
         "   .     " +
         "   ..    " +

        "   ...   " +
        "   ..    " +
        "   .     " +
        "         ")
    
    public static let pauseMatrix = NuimoLEDMatrix(string:
        "         " +
        "  .. ..  " +
        "  .. ..  " +
        "  .. ..  " +
        "  .. ..  " +
        "  .. ..  " +
        "  .. ..  " +
        "  .. ..  " +
        "         ")
    
    public static let nextMatrix = NuimoLEDMatrix(string:
        "         " +
        "         " +
        "   .  .  " +

        "  .   .  " +
        " ..  ..  " +
        "... ...  " +
        " .   .   ")}
    
    public static var lightBulbMatrix: NuimoLEDMatrix {return NuimoLEDMatrix(string:
        "         " +
        "   ...   " +
        "  .   .  " +
        "  .   .  " +
        "  .   .  " +
        "   ...   " +
        "   ...   " +
        "   ...   " +
        "    .    ")}
    
    public static var powerOnMatrix: NuimoLEDMatrix {return NuimoLEDMatrix(string:
        "         " +
        "         " +
        "   ...   " +
        "  .....  " +
        "  .....  " +
        "  .....  " +
        "   ...   " +
        "         " +
        "         ")}
    
    public static var powerOffMatrix: NuimoLEDMatrix {return NuimoLEDMatrix(string:
        "         " +
        "         " +
        "   ...   " +
        "  .   .  " +
        "  .   .  " +
        "  .   .  " +
        "   ...   " +
        "         " +
        "         ")}
    
    public static var shuffleMatrix: NuimoLEDMatrix {return NuimoLEDMatrix(string:
        "         " +
        "         " +
        " ..   .. " +
