from turtle import *

k = 20
left(90)
speed(100)

for i in range(3):
  pd()
  for i in range(2):
    forward(7 * k)
    right(90)
    forward(7 * k)
    right(90)
  pu()
  forward(6 * k)
  right(90)
  forward(6 * k)
  left(90)
pu()
for x in range(0, 15):
    for y in range(0, 15):
     goto(x * k, y * k)
     dot(3)