[math-fun] Jörg's t-shirt rep13

jj>Extra points if you do that gif-ery for the curve http://jjj.de/tmp-ryde/t-shirt-R13-15-hires-cropped.png (L-system at bottom, turns are by 120 degrees). Total curve should be light gray, and the moving part should be 1/13 of the total (so the same shape will appear 13 times, as indicated in the image). ... plus you get a T-shirt! (If you use the image to, well, print one. I got one and it looks quite OK). Best, jj That highly symmetric (almost dihedral 6) supersnowflake from three of these in a loop--is that also rep13? Yours? --rwg