A declarative scene compiles to a timeline; an injected backend paints it. Two vector engines, both palette-blind (colors are theme tokens). Left builds & rotates 3D shapes (Zdog); right draws SVG line-art stroke-by-stroke (Vivus).
A gyroscope: a rotor spinning inside a tilting rig (nested transforms), an orbiting bead, a base that reveals in.
A process flow assembling itself — node, arrow, node — the drawing order carries the meaning.