This example shows a yellow smiley face rendered as an SVG graphic, centered within the viewport. The face consists of three main shapes: a yellow circle for the head, two small black circles for the eyes, and a curved mouth created using an arc path. The code uses React to define the component structure and D3’s `arc()` function to generate the mouth’s path geometry, with all coordinates calculated relative to the center point. The SVG circles and path are styled with a thick black stroke and yellow fill.