Go to a different applet:
This is an animated and quite hyperactive version of lab 10 for the entry level programming class at BYU. I already had mine changing size and color before, and one of my coworkers inspired me to make them move around the screen, too. You can see his here, but it is liable to crash your browser (you've been warned).
Report bugs and give suggestions here.
These applets were developed by Matthew Reeder. Please get my permission before using these applets on your own site.
(And trust me, it will be easier if I help you use them :-p)