$ python
>>> from graphics import *
>>> from turtlegraphics import *
>>> gw = GraphWin("Square", 400, 400)
>>> t = Turtle(gw)
>>> t.go(100)
>>> t.turnLeft(90)
>>> t.go(100)
>>> t.turnLeft(90)
>>> t.go(100)
>>> t.turnLeft(90)
>>> t.go(100)