A grid of randomly generated cartoon faces fills the screen, each with a yellow circular head, black outline, two eyes, and an arc-based mouth. The example demonstrates React components composing SVG shapes, where each face is built from `<circle>` elements and a D3 `arc` path for the mouth. Eye size varies per face via `Math.random()`, while D3's `range` generates the 24 faces in the layout, using d3.v6 and React 16.13.1.