#http://www.mathcurve.com/courbes2d/anguinee/anguinee.shtml

vertices = D1:1000 D2:101

u = from (-PI*0.95) to (PI*0.95) D1
v = from 0 to 50 D2

d = rand2(1, 10)

x = d*tan(u/2)
y = v/2*sin(u)

v = v*0.1
