I used Claude Code to build a website with real lunar phases, local-time synchronization, and planetary gravity

**Why and how:** * I spent \~6 days and even reached limits with Claude Max x20 once. * I did it with Opus 4.8 on Ultracode mode. (in Claude Code) * **THIS IS NOT A REAL WEBSITE, IT'S JUST AN EXPERIMENT TO TRY CLAUDE CODE POWER.** * Anyone can try it here (all text are nothing, it's just a demo) [https://tesq-production.up.railway.app/](https://tesq-production.up.railway.app/) **What's inside:** * The website features a cube (the Tesseract from Marvel) that you can throw into water, onto the Moon's surface, or onto the Sun using the left mouse button (LMB). You can also rotate it using the right mouse button (RMB). * It uses real-world textures for the Earth, Moon, Sun, space, and sky. * The lunar cycle is synchronized, including phases such as the new moon and other moon phases. * The environment is synchronized with your local time: if it's nighttime where you are, it will be nighttime on the website; if it's daytime where you are, it will be daytime on the website and etc. *…