Something to play around with: waves
http://www.agtijmensen.nl/Applets%20sim ... ource.htmlIt's a java-aplet that has a couple of cool setups, it's sometimes amazing what kind of forms a wave can take.
If you think "wtf, what do i care about waves", take a look at it (you can adjust the colours) it's like some crazy psychedelic applet for tripping physicists.
Btw set simulation speed low for maximum effect (unless you're on a slow ass computer like the own i use at school). And change the colours!