This example shows two nested cartoon faces rendered as SVG. The first face has a yellow circular background, black stroke, offset eyes, and a smiling arc; the second face overlaps it with larger proportions and a thicker stroke. The code builds the faces using React components, with the smile generated by `d3.arc` in the `Smile` component. The `FaceContainer` renders an SVG wrapper, while `BackgroundCircle` and `Eyes` define geometric elements. Both faces are positioned with fixed dimensions and offsets via JSX props.