This example uses D3.js to construct a cartoon face from basic SVG shapes. A yellow circle serves as the head, with two eyes and eyebrows positioned symmetrically, and an arc-based path creates a smile. The animation, driven by D3's `.transition()` API, makes the eyebrows move up and down in a looping motion. The SVG is rendered at 960 by 500 pixels, with the face assembled by translating groups to center the features.