A grid of identical smiley faces appears, each built from yellow circular faces, black eyes with white outlines, and a curved mouth stroke. The example demonstrates modular React component composition, where `Face` assembles `FaceCircle`, `EyeCircle`, and `MouthArc` within a `FaceContainer` that applies an SVG transform. `d3.arc` generates the mouth path, while `d3.range` in `index.js` maps over an array to render multiple faces. All graphics are drawn as SVG elements in React.