A blank SVG canvas fills the browser window, capturing mouse movement through an `onMouseMove` handler that logs to the console. The only visible element is a fixed circle with a radius of 54 pixels, positioned near the top-left corner at coordinates (45, 20). Despite the README’s claim that the program follows the user with a circle, the circle does not move in response to mouse events. Built with React, the component renders the SVG directly, using `window.innerWidth` and `window.innerHeight` for the canvas dimensions.