This example shows a classic smiley face rendered as a yellow circle with black stroke, two eyes, and a mouth arc. The visualization is built using React components that render SVG elements, with D3’s `arc()` function generating the mouth path. All geometry is computed from fixed pixel dimensions and offsets, and the SVG is centered on a 960-by-500 canvas. The code relies on React 16.9 and D3 v5, with no interactive or data-driven behavior.