; Creates a square in center alternating with squares and pentagons. ; nell tile006.nll PIC 7 | nellsvg 200 200 mm 0.5 1 > tile006.svg l = 10; a = 2*pi/4; b = 2*pi/5; T1 : L(l) T(b) L(l) T(b) S(T2,1) L(l) T(b) S(T2,1) L(l) T(b) L(l) T(b); T2 : L(l) T(-a) L(l) T(-a) S(T1,1) L(l) T(-a) L(l) T(-a); PIC : P(100,100) T(a/2) M(-l/sqrt(2)) T(-a/2) S(T2,1) M(l) T(a) S(T2,1) M(l) T(a) S(T2,1) M(l) T(a) S(T2,1) M(l) T(a) P(100,100) C(8.7*l-2.5) C(8.7*l);