I’ve been sitting on this one for a few years. Mind you, for most of that time I thought I had lost it amongst my many backups and migrations from machine to machine.
This is a Quartz Composer… um… composition that I put together back when Quartz Composer was only new. Today I fired it up under Leopard’s newer shinier Quartz Composer and it still seems to work. I played with it for a minute or two and then added a couple of extra settings for people to play with.
Click “Read More” to see some screen-shots and videos showing what various tweaks to these settings can do.