import rhinoscriptsyntax as rs
rs.DeleteObjects(rs.AllObjects())

def create_ellipses_and_loft():     
    major_radius = 10.0      
    minor_radius = 3.0      
    num_ellipses = 10
    spacing = 8

    plane=rs.WorldXYPlane()
    ellipses=[]
    for i in range (num_ellipses):
        if i%2:
            ellipse=rs.AddEllipse(plane,major_radius,minor_radius)
        else:
            ellipse=rs.AddEllipse(plane,minor_radius,major_radius)
        #rs.MoveObject(ellipse,(0,0,i*spacing))
        rs.RotateObject(ellipse, (120,60,0), i*(360/num_ellipses),(1,1,0))
        ellipses.append(ellipse)
    rs.AddLoftSrf(ellipses,closed=True)
    #rs.AddLoftSrf(ellipses)

create_ellipses_and_loft()