This example displays a single large purple circle with a green outline, centered vertically near the top of a 1000 by 1000 SVG canvas. The circle is drawn directly in `index.html` using SVG markup. The visualization also includes a React-based “Hello JSX” heading, rendered into a root `<div>` via `ReactDOM.render`, showing a minimal combination of raw SVG and React 18.2.0. The page hides body scrollbars with CSS and loads React and ReactDOM from the unpkg CDN.