This example shows a simple smiley face constructed from nested SVG shapes, with a yellow circular head, two eyes, and a curved mouth arc, all centered on a 960×500 canvas. The face is built using React to render SVG elements, while D3’s `arc` generator creates the mouth path from angular start and end positions. Position and size values are defined as constants and applied via coordinate transforms. The code demonstrates a minimal integration of React and D3 for static geometric visualization.