This example shows a yellow circle with a black outline that follows the user’s cursor across an SVG canvas. The circle is rendered inside a React component tree, with its position updated via React state and mouse event handlers. It uses React hooks like `useState` and `useCallback`, while the circle’s shape is defined as a simple SVG `<circle>` element. The code splits components into separate ES6 modules for the background, eyes, and mouth, though only the background circle is currently visible in the interaction.