The construction system in 04 — particle sizes, corner radii, the 1.5a connection fillet, connection rules 5 and 6, and the composition rules — implemented as a generator in two steps. Step 1: choose sphere diameters and a light — a point light or a directional one at infinity — and the particle sizes and connections on the prescribed grid follow; the SVG is generated on the spot. Shading is either generated from the light — by distance from a point light, by direction from a directional one — or taken from the four defined spheres, turned to face the light.

Step 2 edits the result in detail: paint particles cell by cell, stamp the four defined spheres or the CENTRAL base composition, and transform the whole pattern. Connections are derived from rule 5; only a particle on the outer edge may drop one under rule 6. The layout is encoded in the page URL, so it can be shared as a link.