mouse follower
A yellow smiley face is rendered as an SVG circle with black stroke, two eyes, and a mouth arc, centered on a 960×500 canvas. The example demonstrates how to draw the face using React components and D3’s `arc` generator, with the mouth path constructed from inner and outer radii and angular extents. The code imports `arc` from `d3`, uses JSX to define SVG elements, and positions all parts relative to the center. It serves as a minimal static illustration of combining React’s declarative structure with D3’s shape utilities for SVG output.