SETSHAPE shapenumber.or.name

	sets the shape in which the turtle is drawn.  The input is either
	a shape number or the name of a shape:

	 0  triangle	 1  turtle

	The shape affects only the appearance of the turtle cursor; the
	turtle's position, heading, and pen are unchanged, as are the lines
	it draws.  The triangle is the initial shape.  See SHAPE.

