This example displays a stylized smiley face drawn on an SVG canvas, with eyebrows that animate in a repeating up-and-down motion. Built using D3.js v5, the code constructs the face by appending circle, rect, and path elements to an SVG group, and drives the animation with the `transition` API to move the eyebrow group’s `transform` attribute over two-second intervals. The mouth is rendered using the `arc` generator from d3, specifying inner and outer radii and angle parameters.