The new Linkbot Sketch Pack adds fun drawing capabilities to Linkbot robots! Program the Linkbot to create all kinds of shapes and patterns as it moves over a paper or whiteboard surface, lowering the pen to draw and raising it to move to another area without drawing. The following program, written in Ch code, shows how to control the Linkbot so that it traces out a square. (PDF file with code available here.) /* Square Drawing Demo This demo shows how to program the robot to