I've created a GitHub-style contribution grid animation using Anime.js 4.0. The animation includes:

1. A 7x52 grid of squares representing daily activity (similar to GitHub's yearly contribution chart)
2. Random activity levels with appropriate color coding (from light to dark green)
3. An initial reveal animation with staggered timing from the center
4. A subtle continuous pulsing animation that loops indefinitely
5. Random activity updates every 5 seconds that animate smoothly between states

The grid uses GitHub's dark theme colors and includes a legend showing the activity levels.