D3 Face
A yellow circle with black strokes forms a face, featuring two eyes and eyebrows that animate in a blinking motion, while a mouth is drawn as an arc. The eyes scale vertically to simulate blinking, and the eyebrows shift upward twice before returning. Built with D3 v3, the visualization uses SVG elements and transitions, leveraging `select`, `arc`, and chained `transition` calls to orchestrate the timed animations.