import rhinoscriptsyntax as rs

rs.DeleteObjects(rs.AllObjects())

def create_ellipses_and_loft():
    center = (0, 0, 0)      
    major_radius = 5.0      
    minor_radius = 3.0      
    num_ellipses = 10       
    spacing = 5             

    ellipses = []
    for i in range(num_ellipses):
        z_offset = i * spacing
        plane = rs.MovePlane(rs.WorldXYPlane(), (center[0], center[1], center[2] + z_offset))
        if i % 2 == 1:
            plane = rs.RotatePlane(plane, 90.0, plane.ZAxis)
        ellipse = rs.AddEllipse(plane, major_radius, minor_radius)
        if ellipse:
            ellipses.append(ellipse)

    if len(ellipses) > 1:
        loft = rs.AddLoftSrf(ellipses)
        if loft:
            rs.SelectObject(loft[0])

create_ellipses_and_loft()