import rhinoscriptsyntax as rs
import random as ran

rs.DeleteObjects(rs.AllObjects())

number=18
plane=rs.WorldXYPlane()
abstand=7
crvs=[]


for i in range (number):
    if i%2:
        curve=rs.AddEllipse(plane,10,6)
    else:
        curve=rs.AddEllipse(plane,10,20)
    #rs.MoveObject(curve,(0,0,i*abstand))
    rs.RotateObject(curve, (120,60,0), i*(360/number),(1,1,0))
    crvs.append(curve)
rs.AddLoftSrf(crvs,closed=True)