from turtle import*
down()
left(90)
tracer(0)
screensize(5000,5000)
k=50
for x in range(2):
    forward(14*k)
    left(270)
    backward(12*k)
    right(90)
up()
forward(9*k)
right(90)
backward(7*k)
left(90)
down()
for x in range(2):
    forward(13*k)
    right(90)
    forward(6*k)
    right(90)
up()
for x in range(-100,100):
    for y in range(-100,100):
        goto(x*k,y*k)
        dot(4)
update()
done()