This example displays a single large circle centered within an SVG canvas, rendered on a blank page with no margins. The visualization uses plain HTML and CSS to set up the page layout, while the circle is drawn using an SVG `<circle>` element with a radius of 200 pixels and a fill color inherited from the default black. The code relies on JavaScript only through the inclusion of the HTML starter template, with no external data source or interactive behavior demonstrated. It serves as a minimal standalone visualization example.