This example displays a classic smiley face rendered as a yellow circle with black outline, two eyes, and a curved mouth, all composed using React components and SVG elements. The face is centered within a 960x500 viewport, with each feature positioned using absolute coordinates derived from center offsets. The code integrates React for component structure and d3’s `arc` generator to create the mouth path, which is drawn between fixed start and end angles. SVG shapes like `circle` and `path` are used for the visual output, with hardcoded dimensions for radius and stroke width.