A grid of sixteen smiley faces, each with a yellow circular head, black outlined eyes, and an open mouth, demonstrates reusable React components for SVG visualization. The display shows how randomized parameters produce variation in eye offset, eye radius, mouth width, and mouth radius across the faces. Built with React and D3 v7, the code uses the D3 arc generator to create each mouth path, while FaceContainer, BackgroundCircle, Eyes, and Mouth components compose the SVG structure with a single shared transform for centering. Each face is rendered independently with deterministic randomness applied per component.