Pencil Lead to Carbon Atom Continuous Zoom

A 30-second Three.js single-take zoom animation that pushes from a hexagonal pencil on a desk through the lead, graphite grains, graphite layers, and the carbon honeycomb grid, finally stopping on a single carbon atom. A faint outline of the pencil's hexagonal cross-section overlays the end to echo the carbon hexagon. Includes English stage labels and a cm→nm scale bar. The prompt is a structured spec, originally written in Japanese, calling for a square frame, code-only rendering, and auto-looping playback. Suited to scale-based science explainers and materials science short videos.