; Creates a Moire pattern with two sets of concentric circles. ; nell circ2.nll START 3 | nellsvg 4.3 4.1 in 0.02 1 > circ2.svg n = 40; r = 0.05; dr = 0.05; T1 : C(r) A(r,r+dr); START : P(2.05,2.05) S(T1,n) A(r,dr) M(4*dr) S(T1,n);