An SVG face built from D3.js primitives—circles for the head and eyes, rectangles for brows, and an arc path for the mouth—appears on a teal background. The face is centered using SVG group transforms, with features positioned via computed coordinates. D3 transitions animate the eyes and mouth, moving them in a sequence of translate transformations over three-second durations. The styling comes from an external CSS file, while the D3 library (v5) handles both shape creation and the tweening of the SVG attributes.