static int[,] imageF =
        {
            {0,0,0,0,0,0,0,0,0,0 },
            {0,0,1,1,1,1,1,1,0,0 },
            {0,0,1,0,0,0,0,0,0,0 },
            {0,0,1,0,0,0,0,0,0,0 },
            {0,0,1,0,0,0,0,0,0,0 },
            {0,0,1,1,1,1,1,0,0,0 },
            {0,0,1,0,0,0,0,0,0,0 },
            {0,0,1,0,0,0,0,0,0,0 },
            {0,0,1,0,0,0,0,0,0,0 },
            {0,0,1,0,0,0,0,0,0,0 }
        };
        static int[,] imageG =
        {
            {0,0,0,0,0,0,0,0,0,0 },
            {0,0,0,0,0,0,0,0,0,0 },
            {0,0,0,1,1,1,1,1,0,0 },
            {0,0,1,0,0,0,0,0,1,0 },
            {0,1,0,0,0,0,0,0,0,0 },
            {0,1,0,0,0,0,0,0,0,0 },
            {0,1,0,0,1,1,1,1,0,0 },
            {0,1,0,0,0,0,0,0,1,0 },
            {0,0,1,0,0,0,0,0,1,0 },
            {0,0,0,1,1,1,1,1,0,0 }
        };
        static int[,] imageZ =
        {
            {0,0,0,0,0,0,0,0,0,0 },
            {1,1,1,1,1,1,1,1,1,0 },
            {0,0,0,0,0,0,0,1,0,0 },
            {0,0,0,0,0,0,1,0,0,0 },
            {0,0,0,0,0,1,0,0,0,0 },
            {0,0,0,0,1,0,0,0,0,0 },
            {0,0,0,1,0,0,0,0,0,0 },
            {0,0,1,0,0,0,0,0,0,0 },
            {0,1,0,0,0,0,0,0,0,0 },
            {1,1,1,1,1,1,1,1,1,0 }
        };