This fork of the Smile Tweek example renders a yellow smiley face in SVG using React and D3.js. It combines static circles for the head, eyes, and pupils with a D3 arc path for the mouth, all positioned around a central transform. The code defines geometric constants for offsets, radii, and stroke widths, then uses ReactDOM to mount the chart. It relies on D3’s `arc()` generator for the mouth shape and explicit SVG circle elements for the facial features.