This example shows a simple yellow circular face rendered in SVG using React components. The `Smiley` component composes a `FaceContainer` with an SVG `<circle>` for the face and a nested `<circle>` for the eye, positioned via offsets. The `index.js` file sets the canvas dimensions and renders the face centered on screen with ReactDOM. The visualization uses React 16.7, D3 v7 for the `arc` import, and SVG transforms to position elements relative to the center point.