# -*- coding: utf-8 -*-
from turtle import *

def carre(c):
    down()
    setheading(0)
    for i in range (4) :
        forward(c)
        right(90)
    up()
    return


tracer(4,25)#permet de tracer plus rapidement la figure#
hideturtle()
width(1)
for k in range(20):
    for i in range(k):
        carre(20)
        setheading(k*90)
        forward(20)
        
        

exitonclick()