This example builds a yellow smiley face with D3.js, featuring eyes, eyebrows, and a mouth rendered as SVG shapes. The code uses D3 selections to append a circle for the face, two circles for eyes, rectangles for eyebrows, and an arc path for the mouth. A chained `transition` with a 2-second duration animates the eyebrow group’s vertical position upward and then back, creating a moving-brow effect. The face is centered within a 960×500 SVG, and the animation runs once on page load.