This gallery example builds a yellow smiley face in an SVG canvas using D3.js v5. The face is assembled from primitive shapes—circles for the head and eyes, rectangles for eyebrows, and a path for the mouth—all positioned via D3’s `select` and `append` methods. The animation uses D3’s `transition` API to move the eyebrows up and down over two seconds, demonstrating basic DOM manipulation and chained transitions. The code defines all geometry explicitly without external data, relying on D3’s `arc` generator for the mouth’s curved path.