You can play a lot of things for it. Here go some ideas:
Ab, C, Eb, F, Gb, F, Eb, C, Ab
Ab, F, Eb, F, Ab, F, Eb, F, Ab
Ab, C, Db, D, Eb, F, Gb, G, Ab
low Ab (2x), high Ab, Gb, Eb, Db, Bb, A, Ab
You could just keep hitting the Ab
Those are just a few of the stuff you can do.