Use: -The '1' key to change the shade, -The '2' key to change the colour -The arrows keys to move around and draw a symmetrical pattern. -The space bar to change the background colour -'C' clears -'R' resets the lines, so they go back to the middle (but without clearing), if one of them hits a wall and goes wonky.
Each sprite starts at a different location and a different angle, but then follows the same rules.