clear()
setFillColor(green)
forward(100)
right()
forward(100)
left()
forward(100)
right()
forward(100)
right()
forward(100)
left()
forward(100)
right()
forward(100)
right()
forward(100)
left()
forward(100)
right()
forward(100)
right()
forward(100)
left()
forward(100)
right()