from turtle import * from math import pi,sqrt pas = 360 r = 180 # nb d'or phi = (1 + sqrt(5)) / 2 pensize(2) speed(6) penup() goto(-145,-90) pendown() for t in range(8): setheading(90 - 90 * t) # dessin de l'arc for _ in range(pas): right(90 / pas) forward(r * pi / 2 / pas) right(90) # dessin du carre for _ in range(4): forward(r) right(90) # rayon pr etape suivante r *= phi - 1 hideturtle()