Try pausing the simulation at different moments as the attractor is drawn to see how what it plots matches the position and velocity of the pendulum.

	What difference does the size of the swing make to the Posn:Vel attractor?
	How does the amount of friction affect the Posn:Vel attractor?

Take a look at some of the other "attractors" or "phase diagrams" for the pendulum. Can you explain the shape of each of them?