## Fathauer triangle spiral, family 1, m=1, n=3
a2.
angleunit(deg)
let(fi = (1+sqrt(5))/2)
let(one = test(1/fi + 1/fi^2))
tile(1,36,fi,36,1/fi,180,1/fi^2,108)
conway("(0 2)(1 3)")