Yay! After a couple of nights of wiggling lines in Adobe Illustrator, I finished the design. Technically, this isn't zelige because the lines don't weave over and under each other; but interweaving lines like this in Illustrator is a pain.
I think if I ever got a tattoo, this is the sort of thing that I'd get.
(Thinks some more...) Nah; I think it would be the Pythagorean theorem plus some other things like how to construct a golden rectangle.