#http://www.mathcurve.com/courbes3d/noeuds/noeuddetrefle.shtml

vertices = 1000

t = from 0 to (8*PI)

n = rand_int2(2, 10)

r = 10;
x = r*(cos(t) + 2*cos(n*t - t))
z = r*(sin(t) - 2*sin(n*t - t))
y = r*sin(n*t)