Use the arrow keys to rotate the wave up and down or left and right. Use WASD to stretch and twist the wave. Press B to change the backdrop from white to black. Press C to change the color of the dots. Press R to reset. Press space to turn the pen on and off (and clear). Presss K to toggle between mouse and keyboard control.
Music: Ludwig van Beethoven, Piano Sonata No. 23 (Appassionata), 1804-1806, performed by Wilhelm Klempf.
