Fork of Let's Make a Face Part I
A yellow smiley face is drawn as an SVG, with two black eyes and a mouth shaped as a partial arc, all centered on a 960 by 500 canvas. The face is built using React and D3’s `arc` generator, which defines the mouth’s inner and outer radii and angular range. The head is a yellow circle with a black stroke, and the eyes are positioned using fixed offsets and radius values, with the entire group translated to the canvas center.