Flip Countdown
A split-flap countdown timer film: every digit is a mechanical flip card that folds when its number changes, lands on exactly 00:00, then hands off to an end card. Silent 1080p.
How it works
Write a sheet.json: countdown seconds, layout, flip style, title and end-card copy.
node scripts/build.mjs sheet.json --out build/ bakes the deterministic page.
node scripts/render.mjs --build build --out film.mp4 renders and verifies the silent MP4.