NB. patterns generated from evolute of
NB. integers mod n
NB.
NB. evolute defined in: system\packages\misc\evolute.ijs
NB.
NB. try different values for numbers used, e.g.
NB.
NB.   8 | evolute 80
NB.  39 | evolute 128

viewmat 11 | evolute 128
