Fork of Let's make a face with D3.js!
This visualization demonstrates fundamental D3.js DOM manipulation by rendering a smiley face with animated eyebrows. The code uses D3 v5 to select an SVG element and append geometric shapes—circles for the face and eyes, rectangles for eyebrows, and a path generated with the `d3.arc` function for the mouth. A chained `transition` with a two-second duration repeatedly moves the eyebrows upward and back down, creating a subtle expressive animation. The example relies entirely on D3’s selection, attribute, and transition APIs, with no external data sources.