A yellow circle with black outlines forms a simple face whose eyes, eyebrows, and mouth are built from SVG shapes. The eyebrows, drawn as rectangles, animate upward and back down using chained D3 transitions over two seconds each. The mouth is a path generated with the d3.arc helper, while the face’s construction relies on D3 selections, attribute setting, and SVG groups for positioning. CSS hides page margins and overflow.