This example shows a simple cartoon face composed of overlapping SVG shapes: a yellow circle for the head, two black circles for the eyes, and a dark arc for the mouth. The face is built from modular React components, with each part defined in its own file and passed parameters for positioning and sizing. The `FaceContainer` renders an SVG element, while `Mouth` uses the `d3.arc` generator to create the mouth path. All shapes are centered within a 960x500 viewport.