from turtle import *
tracer(0)
r = 20

for i in range(2):
    fd(5*r); lt(90); back(13*r); lt(90)

up()
back(10*r); rt(90); fd(9*r); lt(90)
down()

for i in range(2):
    fd(11*r); rt(90); fd(7*r); rt(90)
    
up()
for x in range(-100, 100):
    for y in range(-100, 100):
        goto(x*r, y*r)
        dot(3, "red")
update()