from random import *
from turtle import *
import matplotlib.pyplot as plt
speed(0)
penup()
hideturtle()
tracer(0,0)
ds = []
def e():
	return 2*random()-1

def avance(d):
	for n in range(d//10):
		left(e())
		forward(10+e())
def carre():
	home()
	for n in range(4):
		avance(200)
		left(90)
for n in range(10000):
	carre()
	ds.append(distance(0,0))

plt.hist(ds,50)
plt.show()