Fork of Let's make a face with D3.js!
This example uses D3.js to build an animated smiley face in SVG, with eyebrows that rise and fall in a repeating cycle. The code constructs the face by appending SVG circles, a path for the mouth, and rectangles for the eyebrows, then applies chained transitions to move the eyebrow group. D3’s `select` and `arc` APIs handle DOM selection and mouth shape generation, while the animation relies on `transition` with a two-second duration for each movement phase. The face is centered within a 960-by-500 SVG canvas.