import turtle turtle shape turtle turtle penup turtle goto -200 turtle

import turtle

turtle.shape('turtle')
turtle.penup()
turtle.goto(-200, 0)
turtle.pendown()
turtle.speed(1)

def Koch_Line (l ,n):
    if n == 0:
        turtle.forward(10)
        return
    l //= 3
    Koch_Line(l, n-1)
    turtle.left(60)
    Koch_Line(l, n-1)
    turtle.right(120)
    Koch_Line(l, n-1)
    turtle.left(60)
    Koch_Line(l, n-1)


Koch_Line(400, 4)