Design

 

from turtle import*

import colorsys

speed(0)

bgcolor("black")

pensize(2)

h=0.1

for i in range(250):

    c=colorsys.hsv_to_rgb(h,1,1)

    color(c)

    h+=0.1

    circle(i,100)

    rt(100)

    for j in range(4):

        rt(40)

done()