private static void snakeLoop(object state)
        {
            int position = 0;

            while (true)
            {
                for (int i = 0; i < 8; i++)
                {
                    Console.SetCursorPosition(9, 10+i);
                    Console.Write("=");
                    Console.SetCursorPosition(15, 10+i);
                    Console.Write("=");
                }
                for (int i = 0; i < 6; i++)
                {
                    Console.SetCursorPosition(9 + i, 9);
                    Console.Write("=");
                    Console.SetCursorPosition(9+i, 17);
                    Console.Write("=");
                }

                System.Threading.Thread.Sleep(300);
                Console.Clear();
                for (int i = 0; i < 4; i++)
                {
                    int[] pos = snakeNewPos(position + i);
                    Console.SetCursorPosition(10 + pos[0], 10 + pos[1]);
                    Console.Write("#");
                }
                position = (position + 1) % 35;
            }
        }

        private static int [] snakeNewPos(int i)
        {
            int[] result = new int[]{0,0};

            // X
            result[0] = i / 7;

            // Y
            if (result[0] % 2  == 0)
            {
                result[1] = i % 7;
            }
            else
            {
                result[1] = 6 - (i % 7);
            }

            System.Diagnostics.Debug.WriteLine(string.Format("{2}) x={0}; y={1}", result[0], result[1], i));

            return result;
        }