Tablet Sketch Explainer — our demo

One example among many. Don't reuse its story, arc, shots, props or timings.

Demo: From Cherry to Cup (51 s) · ipad-sketch.mp4 · source in demo/

The finished page, before the credit card

Story & structure

"This is a cup of coffee. But it began as the seed of a fruit." The film opens on a pencil line seen up close, pulls back to a cup, pushes into the coffee until its brown fills the frame, re-registers it red and shrinks it into a coffee cherry on a branch. From there it walks the loop back to the cup, one colour change at a time, and ends on the whole page with the title written last.

The signature escalates: a line and one block → a block as a transition → colour, then re-coloured → holes as layers → re-registered and split → a magnified match cut with a swatch strip → a block shattered into particles → the whole page.

Shots

# Time Shot Camera Native move / note
1 0–1.6 The rim drawn slowly 2.7×, almost still the material up close
2 1.6–2.85 Body, handle, saucer pinch out to 1.85× reveal
3 2.85–5.0 Coffee and crema blocks drift —
4 5.0–6.25 Into the coffee; brown fills the frame; red sweeps over accelerating push to 5.6× colour flood
5 6.25–7.05 The red shrinks into a cherry; its outline is drawn cut hidden by the flood; pull 3.4× → 1.95× —
6 7.05–8.6 The branch drawn downward follow the stylus —
7 8.6–12.55 Leaves and fruit white → green → orange/red wave pinch out to the cluster line then colour; re-register
8 12.55–17 Cut cherry, two seeds, notes pan, turn to −1° holes as layers
9 17–24.3 Fresh cherries → sun → dried dark → hulled shells and green beans tilt down re-register; split
10 24.3–25.0 The small green beans grow accelerating push —
11 25.0–33.76 Match cut to the magnified pair; magnifier, swatch strip, heat, yellow / cinnamon / brown, ~196 °C match cut, pinch out magnified match cut; swatches
12 33.76–34.8 First crack: coral bursts, the outline redrawn larger, darker brown punch in 0.16 s to 1.74×, settle —
13 36.95–39.0 The colour shatters into 170 chips that fly into the cup; spout and hot water ride with the grounds shatter
14 39.0–43.3 Coffee re-coloured, steam, cup band back to the opening frame bookend
15 43.3–44.7 The whole page pinch out to 1.0×, level whole page
16 44.45–51 Title, Chinese line, mustard blocks, coral underline; the credit card locked title last

Three more frames from the same engine, without stylus or subtitles (?clean=1): the cluster after the ripening wave, one fruit half done (frame_1), the magnifier and swatches (frame_2), the grounds in flight (frame_3).

Score structure

D major, 96 bpm (bar = 2.5 s), café bossa: nylon guitar comping (syncopated stabs), jazz double bass on 1 and 3, a soft egg shaker on eighths, soft-mallet vibraphone accents.

Voice: Kokoro af_heart, speed 0.70–0.82, ten lines (demo/voice/lines.json), every line passing asr_check.py ("whole" is heard as its homophone "hole"; the line's asr field says so). "196" is spelled out in the voice text and written as digits in the subtitles. Subtitle cues come from the voice timing (demo/tools/cues.py): 13 cues, the shortest held 2.39 s, each ≥ its speech + 0.6 s.

Palette & props

End card

At 46.50 s the stylus draws a note card in the empty top right of the finished page (pencil frame, offset sage block) and writes "Tablet Sketch Explainer", "平板速寫講解" and "LemoLab × Claude Opus 5.5" (Caveat 36 px); complete at 47.46 s and held to 51.0 s. The film's title is the page title, top left. The "LemoLab × Claude Opus 5.5" sign-off belongs to this library's demo only; a user's film carries no LemoLab credit and no copy of this card.

Build notes