This example shows a gold smiley face centered on an SVG canvas. The face has a black outline, two eyes, and an arc-shaped mouth that forms a literal half-circle smile. Built with React and D3, the visualization uses the `arc()` API to generate the mouth path, while the background circle and eyes are drawn as React SVG elements. The face is positioned via a group translation to the canvas center, with all radii and offsets hardcoded.