This example shows a yellow smiley face constructed from three circles—a large face outline and two smaller eyes—rendered as SVG. The code uses React components to declaratively define the circles, with ReactDOM rendering the `<svg>` element into the page. Explicit JavaScript variables (like `centerX`, `centerY`, and `eyeOffsetX`) control the circle positions and dimensions, while static values for radius and stroke width are passed directly as JSX attributes. The face is centered in a 960-by-500 viewport, and the styling is applied with SVG’s `fill` and `stroke` properties.