Fork of D3-1: Making a face
This visualization assembles a cartoon face from basic SVG shapes, showing a yellow circle head, blue eyes, and an arc-based mouth against a white background. The eyebrows animate by moving upward over two seconds, then returning to their original position, cycling through this motion once. Built with D3 v7, the code uses `d3.select` to target the SVG element, `d3.arc` for the mouth path, and chained `transition().duration()` calls to animate the rectangles. Dimensions are extracted from the SVG attributes, and all shapes are positioned relative to the center of the 960×500 canvas.