A grid of 18 randomized smiley faces renders in SVG, each face reusing the same component structure with varying eye offsets, eye radii, and mouth dimensions. The React app maps over a d3 range to generate distinct face instances, while D3's arc API constructs the mouth path and CSS positioning arranges the faces edge-to-edge. The code composes modular React components for the background circle, eyes, and mouth within a reusable Face container.