night dial

A sleep-schedule dial with no text, on a soft white card. A recessed ring with 48 ticks holds two white knobs, a moon at bedtime and a sun at wake-up, with a glossy arc between them that runs from deep indigo through violet to peach. In the centre sits a white sphere whose night side is the sleep window: the terminator follows the arc, and the night side is a deep indigo sky with twinkling stars and a faint nebula. Twenty-four thin bars under the dial fill with the hours of sleep in the arc's colours. It plays an 8-second seamless loop with a drawn cursor: the sun knob is dragged almost all the way round to 23 hours, so the sphere turns into a starry night and the card dims a little, then back to an hour, so it turns white again, then home to eight hours. The dial is one WebGL2 fragment shader on a 2160-pixel canvas; the card, knobs, bars and cursor are plain HTML on a 1080 stage that scales to the window. Every frame is a pure function of time, with window.__render(t) and a ?rec mode for frame-exact video export; reduced motion shows one still. No fonts or images, so it runs offline.