Watch the Repeated Harp & Ending online guitar lesson by Stu Hamm from Stu Hamm U: Solo Bass

The end of this piece repeats the opening phrase but then continues up the scale created by the natural harmonics that occur on the bass. This is a very common compositional tool that you should be aware of and use when writing your own pieces. The trick is to re-state the main theme but alter it to bring the piece to a close.