Minimalist Rectangle with Variable Width

Overview

A 13‑second minimalist explainer showing a hand‑drawn rectangle on a pure black background. The vertical side is labeled “x” (height) and the horizontal side is labeled “23 − 2x” (width). Labels appear as if handwritten, and the camera slowly zooms toward the rectangle for emphasis.

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Phases

#	Phase Name	Duration	Description
1	Fade‑In / Blank	~1 s	Black screen stays empty, establishing the minimalist tone.
2	Draw Rectangle	~4 s	A white, chalk‑style line is animated to sketch the rectangle centrally, one side after another, at a steady pace.
3	Reveal Height Label	~2 s	The symbol "x" is written by hand beside the left vertical side, aligning with the midpoint of that side.
4	Reveal Width Label	~2 s	The expression "23 − 2x" is handwritten above the bottom horizontal side, centered above the rectangle.
5	Slow Zoom Out‑In	~4 s	While the rectangle and labels remain visible, the camera executes a subtle, continuous zoom toward the center of the rectangle, reinforcing focus.

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Layout

┌─────────────────────────────────────────────┐
│                                             │
│                MAIN (visual)               │
│           (rectangle + handwritten          │
│                labels)                     │
│                                             │
└─────────────────────────────────────────────┘

Area Descriptions

Area	Content	Notes
Main	Hand‑drawn rectangle, label $x$ on the vertical side, label $23-2x$ on the horizontal side	All elements are large, white, chalk‑style, centered on a pure black background.

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Notes

• Style assumptions: Chalk‑style lines are achieved with a white stroke that mimics hand‑drawn imperfections; no additional textures are specified.
• Timing: Durations are rounded to the nearest second to keep the total close to 13 s while allowing smooth pacing.
• Camera: The zoom is continuous across the final phase; it starts after the labels appear and ends at the end of the animation.
• No captions: In line with the request, there is no bottom caption, subtitle, logo, or extra decorative element.
• Typography: Labels are rendered as hand‑written text; LaTeX is not used for the visual style but the content is specified as plain text.