Вложенные циклы

from turtle import *
speed(20)

penup()
left(90)
forward(300)
down()

for y in range(4):
    for x in range(5):
        right(90)
        forward(30)
        right(90)
        forward(30)
        right(90)
        forward(30)
        right(90)
        forward(30)
        penup()
        left(180)
        forward(50)
        left(180)
        down()
    penup()
    forward(250)
    right(90)
    forward(50)
    left(90)
    down()
    
done()