This example uses D3.js v5 to draw a cartoon face entirely with SVG shapes, including radial gradients for the background and facial fill. The face is composed of circles for ears, eyes, and head, rectangles for eyebrows, and arcs for the nose and mouth, all positioned via D3’s `arc()` generator. The animation applies a `transition()` to the mouth path, altering its arc attributes over time, while the static layout uses D3 selections and attribute setters.