This example draws a yellow smiley face with D3.js, including eyes, a mouth, and animated eyebrows. The code demonstrates basic DOM manipulation by selecting an SVG element and appending shapes like circles, rectangles, and an arc-based mouth path. D3 v5’s `transition()` method moves the eyebrows up and down over repeated two-second intervals. The face is centered using an SVG group with a translated transform, and all geometry is defined by explicit pixel constants.