This is a fairly straightforward assignment that can be handled in a number of different ways, depending on how you want the pendulum to swing. I videotaped a couple of my lectures for this assignment in which I did a demo showing how I animate. I've broken the lecture into bite sized pieces (the overall lecture and demo was about an hour long).
After each section, I'll show you the drawings that I did.
Part 1- Keys, Path of Action, and Timing Charts.
Here's key #1
Key #5
Key #10
and Key #13 (which is the opposite of #1.