A grid of eighteen randomly generated smiley faces fills the screen, each rendered as a yellow circle with a black stroke, two eyes, and a d3 arc mouth. The faces vary in stroke width, eye offset, eye radius, mouth width, and mouth radius, all set via JavaScript’s `Math.random()` in a React `map` over a `d3.range`. React 17 and D3 v6 compose the SVG output, with each face wrapped in a shared `FaceContainer` that translates the coordinate system for drawing.