This example displays a stylized smiley face composed of geometric shapes, including a yellow circle for the head, two eye arcs, a mouth arc, and a red tongue, all rendered as SVG paths. It uses React for component structure and D3 v6’s `arc()` generator to create the curved mouth, eyes, and tongue, with coordinates computed from the window dimensions. The visualization runs within a full-screen SVG element, demonstrating a straightforward integration of D3 shape generation inside a React application.