Thermostat Frost Dial
A smart-home app, "Hearthline", shows the living room's thermostat on a slatted oak wall: a matte ceramic ring with fine grip grooves around a dark face of tick marks and the set point in big light digits. Turn it colder and frost grows over the ring from the rim inward while the wall cools to steel blue; turn it warmer and the frost melts into beads of water that dry off, the wall glows amber and the air above the dial shimmers. Drag around the dial to turn it; it clicks every half degree.
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React Native · Expo SDK 52+, TypeScript
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