Perfect for natural processes and timelapse. Overlapping layers of acoustic guitar and percussion evolve from simplicity to complexity. Useful for showing progress/achievement, displaying information in an empathic way. Begins small and steady with a single shaker and machine-like guitar part then adds complementary rhythmic/melodic parts, until by :16 it's a mass of neutral-to-positive movement and activity with halftime, bright, simple bell-like melodies that protrude from the fast-moving layers like rocks in a cascading river.