Animated Background — component for app & ui mockups (react)

For AI agents: find the right skill in one call — curl -s "https://skills.varg.ai/api/search?q=<what the person wants>" returns the matching use case and the best skills with install commands, as markdown (Russian works too). Full index: https://skills.varg.ai/llms.txt. Every page has a markdown twin: add .md to its path. Before generating anything, show the person the options on the use-case page.

A rounded highlight pill slides between tab items as the active tab changes

• Install: npx motion-primitives@latest add animated-background
• Registry: motion-primitives · Framework: react · License: MIT
• Docs and preview: https://motion-primitives.com/docs/animated-background
• Source: https://github.com/ibelick/motion-primitives/blob/main/components/core/animated-background.tsx
• Example: https://skills.varg.ai/previews/lib-motion-primitives-animated-background.mp4?v=14754 (Captured from the library’s own demo page (Motion Primitives))
• Time: Drive from the frame. Runs on its own clock (requestAnimationFrame, timers, springs or CSS). Drive it from frame / fps before rendering, or the render drifts.
• Runs: local render, free
• Aspect: any

Prompt that renders it frame-exact

Show a navigation or tab switch in a UI walkthrough with Motion Primitives' Animated Background (https://motion-primitives.com/docs/animated-background, MIT): a highlight pill glides between items in a tab bar placed where the app shows it. Install with npx motion-primitives@latest add animated-background. The pill moves with a shared layoutId layout animation that measures the DOM at runtime, so for a render measure each tab's x and width once and interpolate the pill's position and width from frame / fps (Remotion), or tween it on the paused HyperFrames timeline. Set defaultValue, the transition (spring bounce and duration) and className for the pill color; keep enableHover off.

Used in

• Product launch film
• Feature announcement
• App promo & App Store preview
• Notes-app ad
• Changelog & release notes
• Pull request to video
• Code walkthrough
• Website to video

More app & ui mockups

• Apple Notes Video — git clone https://github.com/vargHQ/code2video-templates && cd code2video-templates/apple-notes-video && bun install
• Avatar Group Hover — npx hyperframes add avatar-group-hover
• Camera Scan Gate — npx hyperframes add camera-scan-gate
• Card Resize — npx hyperframes add card-resize
• Dynamic Grid — npx hyperframes add dynamic-grid
• Focus Swap — npx hyperframes add focus-swap