This example uses D3.js v5 to construct a cartoon face from basic SVG shapes, including a yellow circle for the head, black circles for eyes, and an arc-based path for the mouth. The animation shows the eyebrows moving up and down repeatedly through chained `transition()` calls, each lasting 2000 milliseconds. The code uses D3's `select` and `arc` APIs, with coordinates centered via an SVG group transformation. The face is built programmatically in JavaScript, positioning shapes relative to the center of a 960 by 500 viewport.