A React-based visualization follows the user’s cursor with a single dark circle rendered on a white background. The application uses React 16.9 to manage the component lifecycle, updating the circle’s position based on mouse movement events. It relies on the global `mousemove` event listener and direct DOM manipulation to reposition the circle, without additional charting or animation libraries. The minimal interface includes only a root `<div>` and the bundled script, making the interaction the sole focus.