Eighteen randomly generated smiley faces fill the viewport, each composed of a colored circle, elliptical eyes, and an arc-based mouth. The faces vary in face color, stroke thickness, eye position and tilt, and smile curvature, creating a playful grid of distinct expressions. Built with React components and D3 v5, the code uses D3’s `arc` generator for the mouth and `range` to produce the array of faces. All geometry is rendered as SVG, with random parameters scaled relative to a base size.