Class assignment: make the sphere-with-shadow (posted by FAUXreal, currently being beaten to death on dump) move up and down the skateboard ramp.
Originally I had six frames, made in MSPaint using cut-and-paste, but the sphere went double as it moved (even more than now). Am not using any tweening so the in-between frames had to be done by eye [ironic exclamation point].
Increased the frames to eight; a few had to be redone until the motion was smooth. The sphere now has a slight arc, but the motion of the shadow moves in a straight line. A more realistic animation would increase the diameter of the shadow as it moves to the right.