Harlem Shake en python turtle

import turtle
import random
import time

MAX_TURTLES = 40

def shake(t):
  w, h = turtle.screensize()
  x = random.randint(-w, w)
  y = random.randint(-h, h)
  t.goto(x, y)


sprites = []

for i in range(MAX_TURTLES):
  t = turtle.Pen()
  t.penup()
  sprites.append(t)

for i in range(10):
  for t in sprites:
    shake(t)

turtle.exitonclick()