Problem Set #3
Part 1	Hand in: p1.class
	Choose a single shade (grayscale) to display on your canvas.
Part 2	Hand in: p2.class
	Animate an exactly 1 second interval with a plain Paper animation (i.e. using only the single gray field and no extra graphics). Make the sequence repeat continuously, and make the rhythm count! Try not to be so sleepy this time.
Part 3	Hand in: p3.class
	Animate over an exactly 1.5 second interval the flight of a line. Again only use grays, and only draw one line. Repeat the animation continuously.
Part 4	Hand in: p4.class
	Animate over an exactly 2 second interval the flight of at most twenty lines. Again using only grays. Repeat the animation continuously.
Part 5	Hand in: p5.class
	Animate over an exactly 3 second interval the evolution of at most forty lines. Again using only grays. Repeat the animation continuously.