A smiling face, drawn as a yellow SVG circle with black facial features, follows the cursor across a blank canvas. The application tracks mouse movement through React's `onMouseMove` event handler, updating the component's state with the pointer's coordinates. Using the `useState` hook, the circle's `cx` and `cy` attributes are re-rendered on every cursor position change, while the initial mouse position is set to the center of a 960 by 500 viewport. The visualization is built entirely with React 16.9 and ReactDOM, rendering inline SVG elements without any external data source.