A single gray circle is drawn on an empty SVG canvas. The example demonstrates basic SVG shape construction within an HTML document, using a fixed `circle` element with specified center coordinates and radius. The rendering relies on SVG (Scalable Vector Graphics) through the browser's native support, not an external library. The provided `styles.css` file contains general body and class rules, but the visualization itself does not reference them. The data source is a static, hard-coded coordinate value.