WINDOW

Tells the turtle to enter "window" mode. From now on, when the turtle is asked to move past the boundary of the drawing surface, it continues past the boundary where you can't see it. The visible drawing surface is considered as just part of an infinite plane; the turtle can be anywhere on the plane. If you lose the turtle, HOME moves it back to the center of the drawing surface.

Compare this command with WRAP, FENCE, and PERSPECTIVE.

WRAP
FORWARD 950
RIGHT 90
WINDOW
FORWARD 950
FORWARD 100