from turtle import *
k=10
for i in range(2):
    forward(14*k)
    left(270)
    backward(12*k)
    right(90)
penup()
forward(9*k)
right(90)
backward(7*k)
left(90)
pendown()
for i in range(2):
    forward(13*k)
    right(90)
    forward(6*k)
    right(90)
penup()
goto(0, 0)
for x in range(-10, 10):
    for y in range(-10, 10):
        goto(x*k, y*k)
        dot('blue', 4)