Build me a mechanical watch in interactive 3D, in one HTML file with Three.js.
Make it look real: the gold case and the glass on top, the dial and the hands, and behind it the movement you never get to see. The mainspring in its barrel, the gear train, the balance wheel swinging back and forth with its hairspring breathing, the escape wheel and the pallet fork ticking, and the red jewels the gears turn on. The balance wheel swings, the gears turn, and the second hand ticks. I can drag to orbit around it and scroll to zoom.
Add an Explode button. When I press it, every part slides apart in layers with its name on a label. Press it again and it all snaps back together. When I hover a part, it lights up and shows one line on what it does.
No images. Do not ask me any questions. Just build it.
