This example shows a simple smiley face made from three SVG circles: one large yellow circle for the head and two smaller black circles for the eyes. The React component defines the layout using constants for dimensions, center coordinates, eye offsets, and radius, then renders the SVG elements declaratively. The code uses React 17 and ReactDOM to mount the component into the DOM, leveraging JSX within the `App` function to structure the SVG. The rendering relies on standard SVG circle elements with stroke and fill properties.