import turtle as t

t.pen(speed =0)

def vk(l, n):

vk(d, n - 1)

def f(l, n):

t.right(120)

f(300, 6)

"""

from tkinter import *

import os

t.ht()

ts = t.getscreen()

ts.getcanvas().postscript(file="{0}.eps".format("van_koch"))

t.mainloop()

"""