Top Draw is a new Mac OS X program released by Google as part of their Mac Developer Playground (http://code.google.com/mac/):

<<Top Draw is an image generation program. By using simple text scripts, based on the JavaScript programming language, Top Draw can create surprisingly complex and interesting images. The cool part is that the program has built in support for taking your image and installing it as your desktop image. There's even a Viewer application that can be installed in the menubar to automatically run with the parameters (such as the selected script, update interval) that you've specified.>>
http://code.google.com/p/topdraw/

Images from Google's blog post on this (http://googlemac.blogspot.com/2008/09/introducing-top-draw.html):
http://2.bp.blogspot.com/_N76yGvbMPVw/SNv0CjhCWYI/AAAAAAAAADI/ouioEcPPrYo/s320/Top+Draw+1.jpg

http://4.bp.blogspot.com/_N76yGvbMPVw/SNv0RsIwINI/AAAAAAAAADQ/QRC91WAI-sE/s320/Top+Draw+2.jpg

http://4.bp.blogspot.com/_N76yGvbMPVw/SNv0R3OH2zI/AAAAAAAAADY/Ks3MemgN5pI/s320/Top+Draw+3.jpg

Anyone with a Mac here who gave this a try?