This example shows a single yellow circle that follows the mouse cursor across an SVG canvas, creating a direct and immediate interaction. The circle’s position is updated on every mouse move, responding in real time to user input. The visualization is built with React, using the `useState` hook to track the cursor’s coordinates and the `useCallback` hook to handle the `onMouseMove` event. Rendering is handled through SVG elements, with React managing the circle’s `cx` and `cy` attributes.