using System;

class Program
    {
    static void Main(string[] args)
        {
        int x = 0, y = 0;
        while(true)
            {
            ConsoleKeyInfo InputKey = Console.ReadKey();
            switch(InputKey.Key)
                {
                case ConsoleKey.UpArrow:
                    y--;
                    break;

                case ConsoleKey.DownArrow:
                    y++;
                    break;

                case ConsoleKey.LeftArrow:
                    x--;
                    break;

                case ConsoleKey.RightArrow:
                    x++;
                    break;
                }

                Console.Clear();
                Console.SetCursorPosition(x,y);
                Console.Write(x%2==0 ? '#' : '$');
            }
        }
    }