A grid of randomly generated smiley faces fills the viewport, each with a yellow circular head, black-outlined stroke, two eyes, and a curved mouth arc. The faces vary in stroke width, eye offset, eye radius, mouth width, and mouth radius, produced by a React app that maps over a `range(6*3)` array to render 18 `<Face>` components. Built with D3 v7’s `arc()` function for the mouth and SVG primitives like `<circle>` and `<path>`, the example uses React 17 and renders everything as SVG within a `FaceContainer` that translates each face to a centered position.