static void Main(string[] args) { int choice = 0; TurtleGraphics turtleGraphics = new TurtleGraphics(); Canvas canvas = new Canvas(); Turtle sandy = new Turtle(); while (choice != 9) { turtleGraphics.printOptions(); choice = Convert.ToInt32(Console.ReadLine()); switch (choice) { case 1: sandy.UpOrDown = 0; break; case 2: sandy.UpOrDown = 1; break; case 3: sandy.ChangeDirection(1); break; case 4: sandy.ChangeDirection(0); break; case 5: Console.WriteLine("How many steps?"); int a = Convert.ToInt32(Console.ReadLine()); sandy.Walk(a, ref canvas.floor); break; case 6: canvas.printFloor(); break; case 9: Console.WriteLine("THANKS!"); break; } } }