#CODE = #B059
from turtle import *
import colorsys

tracer(3)
speed(0)
pensize(2)
bgcolor('black')
h = 0.7

for i in range(180):
    c = colorsys.hsv_to_rgb(h,1,1)
    color(c)
    h += 0.004
    goto(0,0)
    circle(180-i, 90)
    lt(90)
    lt(90)
    circle(180-i, 90)
    lt(18)
done()