Icon Era Scrubber
The icon history of an invented mail app, Postbox, in a dark room lit by two soft coloured lights: "App icon history · Postbox" at the top, the app's icon large in the middle, under it the year in big figures with the era's name and a line about it, and a ruler of years (2008 to 2026, a tick a year, every other one labelled, with fading unlabelled ticks past both ends so it runs off the screen) along the bottom under a white needle. The icon is one 3D object that is all four eras of icon design in turn: 2008's glossy blue tile with a bevel and a curved gloss over an airmail envelope with a red stamp; 2013's flat tile with a printed white envelope; 2019's soft, rounded, lit tile; 2026's clear glass tile bending the room's lights, where the envelope has folded into a paper plane.
React Native · Expo SDK 52+, TypeScript
✦ If the result drifts from the video, tell your agent what looks different and how it should look. A short correction usually closes the gap.