This example shows a simple yellow circle with a black outline, two smaller unfilled circles representing eyes, and a black line for a mouth, forming a static smiley face. The React component `App` returns a single SVG element with hardcoded coordinates and dimensions, rendering the shapes declaratively via JSX. It uses the React 16.13.1 UMD build and `ReactDOM.render` to mount the component into the `#root` div in the HTML page. All graphical elements are drawn directly with SVG primitives, with no data or interaction involved.