click space to switch costumes! wow is very cool you might be asking, "how does it work?" well. its actually pretty interesting. essentially, it makes a bunch of transparent stamps along a line. the line is defined by the original point and the destination of the next frame. the number of detail is how many of these stamps to make, so if the detail is set to 2, it will only make 2 relatively opaque stamps along the line. if the number of detail is 50, the stamps will be more transparent. next, it uses a portion of a sine wave to distribute the stamps along the line. this means that more stamps will be in the middle of the line and less will be near the ends. very cool :thumsup: 2nd project today (i just copied the code from pong ping and made it more user friendly)