This example shows a yellow smiley face rendered in SVG, with its eyebrows animating up and down repeatedly. The face is drawn using D3.js v5, building circles, rectangles, and a mouth path through basic DOM selection and appending. Eyebrow movement is achieved with chained `transition` calls that alternate the vertical translation of the eyebrow group over two-second intervals. The code imports `select` and `arc` from D3, computes layout from the SVG’s dimensions, and uses inline attribute settings for styling and positioning.