I found a screensaver a couple of years ago that did basically the same thing (http://i.document.m05.de/?page_id=438 http://i.document.m05.de/?page_id=438), and

I found a screensaver a couple of years ago that did basically the same thing (http://i.document.m05.de/?page_id=438 http://i.document.m05.de/?page_id=438), and I improved on it some (quadrupled the outputs). Shameless plug: I don't know if it still works, but if you have a Mac you could try: http://lost-found.se/projects/surveillance-saver-quad/ http://lost-found.se/projects/surveillance-saver-quad/