clear()
forward(70)
right()
forward(50)
right()
forward(70)
right()
left()
left()
forward(50)
right()
forward(50)
right()
forward(50)
left()
forward(70)
right()
forward(50)
right()
forward(70)
left()
forward(50)
right()
forward(50)
right()
forward(50)