[sp332]

You can download it from here http://www.pouet.net/prod.php?which=51074 It's been updated to run more reliably (edit: on Vista) but I can't find a version that will run on Win7.

Edit: I found a similar one on Shadertoy https://www.shadertoy.com/view/lsf3zr

[foxhill]

i just ran it on my mac successfully with wine..!