hey mumike, thanks for the feedback! i actually made a similar thing with a short music loop a while back. check it out if you want to...
http://timconceivable.tumblr.com/post/153896925653/theta-visuals
it's definitely better with music! i intentionally left this without music so that a user could have their own playing along with it if they wish. this was just a little experiment that seemed fun. fractals would definitely be cool! i'm just starting out with coding, so i will have to see if it's as easy as you say! :)