Fork of Smiley Face Part II
A yellow smiley face constructed with React and rendered as SVG responds to mouse movement by tracking the cursor across the screen. The face is drawn using React elements for the head, eyes, and mouth, while the eyes follow the mouse position via React state updates triggered by an `onMouseMove` event handler. The code imports React and ReactDOM, uses the `useState` hook to manage cursor coordinates, and relies on SVG circles and transforms for the visual layout. The final rendered output appears inside an HTML page that loads React 16.9.0 from a CDN.