I'll take what the others said, and embelish a bit.

First a note: When doing any maneuver, Start from straight and level flight, and end with straight and level flight at the exact same altitude you started at.

With that in mind, do these:

3 loops... each perfectly round, each one in the exact same path as the other, with no loss of speed on the up side, and no gain of speed on the down side.

3 rolls gaining or losing no altitude.

Cuban 8

Hammerhead