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

        self.init(string: string)
    }
    
    //MARK: Predefined matrices

    public static let emptyMatrix = NuimoLEDMatrix(string:
        "         " +
        "         " +
        "         " +
        "         " +
        "         " +
        "         " +
        "         " +
        "         " +
        "         ")

    public static let musicNoteMatrix = NuimoLEDMatrix(string:
        "         " +
        "  .....  " +
        "  .....  " +

        "    .    " +
        "    .    " +
        "         " +
        "    .    ")}
}

