Make a face
A yellow circle with red eyes, green eyebrows, and a green mouth forms a simple face in the center of an SVG canvas. The eyebrows animate upward and back down in a repeated motion using D3 transitions. The code builds the face with SVG shapes—circle, rect, and path elements—and uses the d3.arc generator to create the mouth’s curved path. All geometry is defined relative to a centered group, and the transition chain moves the eyebrow group vertically.