This example shows a simple SVG smiley face composed of three circles on a yellow background, rendered within a fixed 960 by 500 pixel canvas. The page is a bare minimum HTML document that includes a heading and embeds the graphic directly. It uses raw SVG markup with circle elements, setting their center coordinates, radii, fill colors, and stroke properties. The page also imports the React library from a Content Delivery Network, though the visualization itself does not depend on React for its rendering.