A cartoon face rendered with D3.js v5 in SVG animates its eyebrows with chained transitions. The code builds a yellow circular head, two eyes, and a mouth shaped by an arc generator with defined inner and outer radii. Eyebrow rectangles transition vertically up and down over two seconds each, using `selection.transition()` to create a looping bounce. The visualization runs in a React framework on a fixed 960×500 canvas, demonstrating basic SVG shape construction and timed attribute interpolation without external data.