#http://www.mathcurve.com/surfaces/mobiussurface/mobiussurface.shtml
vertices = D1:100 D2:100
u = from  (-2) to (2) D1
v = from 0 to (PI*2) D2
a = rand2(1, 10)
x = (a + u*cos(v/2))*cos(v)
z = (a + u*cos(v/2))*sin(v)
y = u*sin(v/2)
