from turtle import *

def square():
    fd(10)
    lt(90)
    fd(10)
    lt(90)
    fd(10)
    lt(90)
    fd(10)
    lt(90)
    up()
    fd(20)
    down()

square()
square()
square()
square()
square()
square()
square()
square()
square()
square()
square()
square()