Burgmüller Op. 100, no. 11 The Wagtail
This etude is an great example of a inspired composer making the most out of the smallest of devices, in this case a driving rhythmic motive derived from simple broken chords. It’s used in nearly every measure of the piece: up, down, one hand, both hands, converging, diverging, you name it. Of course, I had to count: 65 times in 38 seconds!