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

# La courbe de KochIsland

def regle():
    nbiteration = 5
    longueur = 6
    angle = 20
    regle = 'F[+F]F[-F][F]'
    #regle = 'F+FF-FF-F-F+F+FF-F-F+F+FF+FF-F'
    axiom = 'F'
    i = 0
    while i < nbiteration:
        j = 0
        axiom2 = ''
        while j < len(axiom):
            pointeur1 = axiom[j]
            if pointeur1 == 'F':
                axiom2 = axiom2 + regle
            if pointeur1 == '+':
                axiom2 = axiom2 + '+'
            if pointeur1 == '-':
                axiom2 = axiom2 + '-'
            if pointeur1 == '[':
                axiom2 = axiom2 + '['
            if pointeur1 == ']':
                axiom2 = axiom2 + ']'
            j = j + 1
        axiom = axiom2
        i = i + 1
    print axiom
    k = 0
    laposition = []
    langle = []
    while k < len(axiom):
        pointeur2 = axiom[k]
        if pointeur2 == 'F':
            forward(longueur)
        elif pointeur2 == '+':
            left(angle)
        elif pointeur2 == '-':
            right(angle)
        elif pointeur2 == '[':
            laposition.append(position())
            langle.append(heading())
        elif pointeur2 == ']':
            goto(laposition[len(laposition)-1][0], laposition[len(laposition)-1][1])
            del laposition[len(laposition)-1]
            setheading(langle[len(langle)-1])
            del langle[len(langle)-1]
        k = k + 1

up()
#left(180)
#forward(400)
#left(90)
#forward(200)
#left(90)
#down()
backward(495)
down()
regle()

#quit()