This example renders a smiley face as an SVG graphic using React and D3. It shows a yellow circle with black stroke, two eye circles, and a curved mouth arc, all centered within a 960×500 viewport. The code uses React’s `ReactDOM.render` to mount the component, while D3’s `arc()` generates the mouth path with specified inner and outer radii and angular start/end points. The drawing is static, with all positional constants like eye offsets and radius defined upfront, and no interaction or data binding beyond the fixed geometry.