This example uses D3.js to construct a yellow smiley face from SVG primitives, including circles for the face and eyes, rectangles for eyebrows, and a path for the mouth. The chart demonstrates fundamental DOM manipulation by animating the eyebrow group’s vertical position with chained `transition` calls over four seconds, moving it up and then back to its original offset. Static attributes define the face’s geometry, while the `arc` generator creates the mouth’s curved shape.