A grid of randomly generated smiley faces shows how small variations in facial features create distinct expressions. The React components accept numeric props for eye offset, eye radius, and mouth curvature, while each face is rendered as SVG circles and a D3 arc path that forms the smiling mouth. The project imports React and D3 v5 directly via CDN, and the unseeded `Math.random` calls in the array map mean every page load produces a unique set of emoji.