This example is a fork of an HTML starter page that displays a single large black circle centered on a 960x500 canvas. The page uses a Scalable Vector Graphics (SVG) element, but note the typo in the tag name: it is written as `<sgv>` instead of `<svg>`, so the circle does not render as a graphic. Instead, the body is blank, with margins removed and overflow hidden. The code relies only on basic HTML and inline CSS for styling, with no JavaScript or external libraries involved.