An animated yellow face with bouncing eyebrows and a morphing mouth is drawn in SVG using D3.js v5. The face is composed of circles, rectangles, and an arc-generated path, all centered within a 960×500 viewport. Transitions animate the eyebrow group’s vertical position over two seconds and change the mouth’s inner radius between 150 and 0 over three seconds, looping indefinitely via a `while(true)` block. The code uses `d3.select`, `d3.arc`, and chained `transition().duration()` calls to orchestrate the continuous motion.