This graphic was produced by a different run of the same program as Screaming Warbot (program in Visual Basic uses a simple algorithm to draw curves starting from third order differences having small random increments), but XOR mode for only some of the limbs (as I think of them) and normal mode for others, allowing the smooth surface to be seen. Texture was added to the background.

http://www.bridgesmathart.org/art-exhibits/bridges2007/sutcliffe.html