Each composition is a stack of concentric bands around the still point — every band one form: harmonic strata, ticks, beads, petals, segments, rings or chords. Density sets how many bands the algorithm composes. Sparse pieces trade in negative space and weight; dense pieces in rhythm and accumulation. Every piece, at any density, keeps one wide hero band of harmonic strata and one solid ring to anchor it. Density is read through the piece's Composition: a Monolith is a handful of bands at any density, a Classic the full stack. Examples below are Classic.