Design

 

from turtle import *

import colorsys

speed(0)

bgcolor('black')

h=0.6

pensize(2)

for i in range(130):

    c=colorsys.hsv_to_rgb(h,1,1)

    color(c)

    h+=0.005

    for j in range(3):

        circle(i)

        rt(36)

done()