An SVG smiley face follows the mouse cursor across a hidden-overflow canvas. The face is built from React components for the background circle, eyes, and mouth, with a d3.arc path generating the curved smile. A range of 18 faces is rendered, each with randomized stroke widths, eye offsets, eye radii, and mouth dimensions, producing a playful, shifting expression as the pointer moves. The composition uses static SVG elements and React’s component model to assemble the graphic.