A Light Ray in a Narrowing Channel
A silent math animation poses a reflection puzzle and lets an accumulating ray trace make the geometry visible.
Field notes / why it works
The opening frame states the two-outcome question and shows the full graph, so the experiment is readable at 0:00. A white ray begins moving by about 0:00.25 and leaves a persistent trail; by roughly 0:14, tightly packed reflections make the narrowing channel tangible without speech or cuts.
Plate 01 / The format in one breath
A blackboard-like mathematical diagram asks a binary question before a moving point begins its experiment. The frame stays fixed while one thin white trajectory accumulates, so viewers can compare the path against the cyan boundary and predict an outcome.
Why it works
- The gold question is visible from 0:00, with the rule and starting point already on screen; there is no setup delay.
- The first visible excursion arrives by about 0:00.5, while repeated floor and curve bounces multiply through 0:03–0:14.
- At roughly 0:14 the reflections crowd near x≈4, making the narrowing geometry visible without a voiceover. The measured cut detector reports zero picture changes because only thin lines move; the sheets visibly show continuous tracing.
Plate 02 / Format card
| Platform · aspect · length | X · 16:9 · 17.5 s · 1280 × 720 · 60 fps |
| Pace | 1 continuous shot · 0 cuts/min · 17.5 s shot · animated line advances throughout |
| Script | No spoken words; one title, one question, a compact formula, an origin label, and a small footer |
| Voice | None |
| On screen | 100% designed mathematical graphic; fixed camera and layout |
| Captions | None; fixed text labels serve as the explanation |
| Sound | No audio track, music, or effects |
| Structure | Question → first collision → repeated reflections → dense cluster; no CTA |
Pro / 13 plates + recipe
The first plates are open. The full dissection is Pro.
Get the timed shots, type and sound specs, and the runnable recipe.
Open the full blueprint- Plate 03 / The hook, frame by frame (first 3 seconds)Pro
- Plate 04 / Structure (beat sheet)Pro
- Plate 05 / Shot grammarPro
- Plate 06 / Visual style guidePro
- Plate 07 / Voice and deliveryPro
- Plate 08 / Sound designPro
- Plate 09 / PackagingPro
- Plate 10 / Script templatePro
- Plate 11 / Production planPro
- Plate 12 / PromptsPro
- Plate 13 / Edit recipePro
- Plate 14 / QA checklistPro
- Plate 15 / Make it yoursPro
- Recipe / runnable promptPro