Press 0-9 to view the shape that corresponds with the number of sides (i.e. if you press 8 you will see an octagon). 0 is 10, 1 is 11, and 2 is 12, in case you were wondering. Press c to see a circle. Press m to lag. Don't press the buttons too fast or else the pen won't draw the shape correctly.
HABALLOON!!! Thank you Mr. Holman and others.