O-R-G has made a few screensavers. The most recent is Three Times (in Blue and Yellow) by Karel Martens. Each of the previous also has a long name: Three Minutes of Doing Nothing, After His Beautiful Machine of 1855, Breaking Like Surf on a Shore Until, The Result of Collapsing Two Simultaneous Views, Al Gore Woke Up One Morning Wondering, Perhaps There is Something Left to Save. These are available directly from O-R-G at $25/each. Or, the set of 6 with a 16-page booklet is $50 + shipping.