John Adams' Shaker Loops runs through four movements that tell you exactly what kind of piece this is.

The movements are Shaking and Trembling, Hymning Slews, Loops and Verses, and A Final Shaking. The titles alone tell you this is minimalist, hypnotic, and rooted in the Shaker tradition of ecstatic movement — a piece that shakes, hymns, loops, and finally shakes again before releasing its grip.