score download:
www.lajosbrons.net/music/repetitions2.pdf
A four bar 10/8 composition in chromatic scale is divided over two pianos. The first repeats those four bars 22 times; the second adds one 2/8 rest at the end end repeats all of that 21 times. The result is a gradual shift of the two "perspectives" on the original composition until they align again.