Make the opening title sequence for a new animated TV show that you invent: an original show with its own name, world and characters (no existing shows, characters or brands).
It should feel like the intro of a real, well-made series. It plays by itself in about 20 seconds when the page opens: a few distinct shots with camera moves and cuts, the main characters and their world introduced in motion, credit-style text that appears in rhythm, and it ends on the show's title as a big logo reveal that holds for a moment. Pick one strong visual style and keep it consistent from the first frame to the last.
Everything you see is made in code: draw and animate it all yourself with HTML, CSS, JS, SVG, canvas or WebGL. Fill the browser window at any size.
Make it one HTML file that opens offline in a browser: no CDN links and no network requests. If you use a library like Three.js, put it inside the file. No image files, no image or video models.
Watch it in a headless browser (screenshots at several moments of the 20 seconds) before you finish.