This example shows a yellow smiley face constructed from SVG shapes, with a circular head, two eyes, and a mouth arc rendered on a dark background. The mouth uses d3.arc to define a semicircular path, while the head and eyes are plain circle elements. The components are built with React functional components and mounted via ReactDOM, with d3.v7 providing the arc generator. The layout uses SVG grouping and translations to center the face at the viewport midpoint.