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REF-1425Source onlineBlueprint rev 01

Fractal Curves Filling the Frame

A continuous black-canvas animation turns simple recursive lines into coloured space-filling forms, then tests the rule through a changing seed angle.

Maker @3blue1brownFor 3Blue1BrownOriginal post ↗
Cut timeline · 1 shots02:33
00:0000:3001:0001:3002:0002:30

Field notes / why it works

The first recursion jumps rapidly from a simple path to a dense pattern at 0:09.2–0:10.8, the strongest replay peak. Nineteen internal visual changes sustain a 153-second single-canvas film, while outline-to-colour reveals around 0:15, 0:35 and 1:02 give each new rule a visible payoff. The seed/result comparison after 2:04 turns the closing abstraction into a clear experiment.

01

Plate 01 / The format in one breath

A single black stage lets mathematical lines draw, subdivide, and become coloured fields. Sparse, small editorial text names each idea; the viewer watches a simple rule produce increasingly surprising shapes. The implied promise appears by about 0:04, when the opening visual gives way to the first line construction.

Why it works

  • The strongest replay peak, 0:09.2–0:10.8, is the first clear jump from a simple path to a tiled recursive pattern. The transformation supplies proof before a long explanation.
  • The structure escalates scale: line at about 0:08, densely filled square by 0:15, coloured area at 0:33, then a new triangular family at 0:50.
  • Comments repeatedly call the animation satisfying and react to the later named curve and angle paradox; the visual result works for casual viewing while the rule rewards close inspection.
02

Plate 02 / Format card

Platform · aspect · lengthYouTube · 16:9 · 2:33.1 · source capture 640×360 at 29.97 fps
PaceOne continuous animated canvas; 0 hard cuts/min; 19 measured internal step changes, about 7.4/min; the single detected shot lasts 153.05 s
ScriptBrief on-screen explanatory sentences, not burned subtitles; no reliable spoken script. The automatic five-word transcript is likely music misrecognition (inferred).
VoiceNone reliably audible or evidenced; use visual explanation and music.
On screenNearly 100% code-rendered motion graphics on black; no presenter or footage.
CaptionsSmall white serif explanatory text at upper left; occasional larger centered serif curve name or bottom labels.
SoundContinuous quiet tonal/music-like bed, roughly 117 BPM (uncertain); measured −25.0 LUFS integrated, −11.4 dBFS true peak.
StructureOpening trace → square recursion → triangular recursion → named forms → parameter experiment and final shape; 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.

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  1. Plate 03 / The hook, frame by frame (first 3 seconds)Pro
  2. Plate 04 / Structure (beat sheet)Pro
  3. Plate 05 / Shot grammarPro
  4. Plate 06 / Visual style guidePro
  5. Plate 07 / Voice and deliveryPro
  6. Plate 08 / Sound designPro
  7. Plate 09 / PackagingPro
  8. Plate 10 / Script templatePro
  9. Plate 11 / Production planPro
  10. Plate 12 / PromptsPro
  11. Plate 13 / Edit recipePro
  12. Plate 14 / QA checklistPro
  13. Plate 15 / Make it yoursPro
  14. Recipe / runnable promptPro