from random import *
from turtle import *
def un_saut(x):
    if random()<0.5:
        return x-1
    else:
        return x+1
def position(n):
    pos=0
    for i in range(n):
        pos+=un_saut(0)
    return pos
def graphe1(n):
    colormode(255)
    goto(0,0)
    for i in range(n):
        forward(un_saut(0)*20) #Pas de 20 pixels
        color((randrange(0,256), randrange(0,256),randrange(0,256)))
def graphe2(p,n):
    for i in range(p):
        goto(0,0)
        setheading(0)
        right(180*i/p)
        graphe1(n)
def graphe3(n):
    reset()
    goto(0,0)
    for i in range(n):
        forward(un_saut(0)*20)
        right(90*(-1)**randrange(0,2))
def graphe4(n):
    reset()
    goto(0,0)
    setheading(0)
    for i in range(n):
        setheading(45*(-1)**randrange(0,2))
        forward(20)