This example shows a grid of 18 randomly generated smiley faces, each rendered as a yellow circle with black outlines, eyes, and an arc-shaped mouth. Built with React and D3 v7, the `Face` component composes smaller components for the background, eyes, and mouth, using D3’s `arc()` generator to create the mouth path. Each face varies its dimensions—stroke width, eye offset and radius, and mouth size—via `Math.random()`, producing an organic, quirky array of expressions.