3D ART

 from turtle import *

def r(x, y):

    rt(x)

    fd(y)

tracer(4)

fd(100)

bgcolor("black")

color("cyan")

width(3)

for i in range(2003):

    fd(i)

    r(90, i)

    r(90, i)

    r(270, i)

    r(90, i)

    circle(100, 90)

done()