A product launch video made entirely of code
Claude Code on Opus 5.5, one prompt, about eight hours: a launch video for a fake calendar app. Name, logo, UI, animation, soundtrack and sound effects — all code, and open source.
What it took
- Time
- 8 h
- Prompts
- 1
A launch video for a product that does not exist. Leon Lin asked Claude Code, running Opus 5.5, for a launch video for a fake calendar app — and it invented the name, the logo and the UI, then animated them, scored them and added sound effects. Everything you see and hear is code. One prompt, about eight hours of work.
The word "fake" is doing honest work. There is no company behind this calendar. The video is the artifact, and it speaks the full grammar of a real launch: the logo reveal, the UI walkthrough, the music telling you when to be impressed. That grammar used to come from an agency.
And it is open source, with the repo linked in the replies — so the "all code" claim is one you can read for yourself.

Made with
Leon Lin
@LexnLin
I asked Claude Code (Opus 5.5) to make a launch video for a fake calendar app and HOLY fuck, everything you see AND hear is code ONE prompt, it cooked for about 8h name, logo, UI, animations, soundtrack, sound effects opensource, repo in replies :) https://t.co/J5Pb3QtFKD
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Captured when this was curated, not live. —