Sierpinsky triangle in Python turtle graphics

sierpinski.py

# https://trinket.io/python

import turtle

L = 200

turtle.speed(1000)
turtle.penup()
turtle.goto(-100, -100)
turtle.color("red")
turtle.pendown()

def piece(n, d):
  if n == 0:
    turtle.forward(d)
    return

  piece(n-1, d/2)
  turtle.left(120)
  turtle.forward(d/2)
  turtle.right(120)
  piece(n-1, d/2)
  turtle.right(120)
  turtle.forward(d/2)
  turtle.left(120)
  piece(n-1, d/2)

piece(3, L)


turtle.left(120)
turtle.forward(L)
turtle.left(120)
turtle.forward(L)

turtle.penup()