A simple D3.js example assembles a face from basic SVG shapes, starting with a circle for the head and adding eyes and a mouth. The code uses D3 v5’s `select` and `append` methods to build the elements inside an SVG canvas, with the circle’s radius set to 200. Styling comes from a linked CSS file that hides overflow and removes margins. The face is constructed programmatically, demonstrating how D3’s declarative chaining can create visual compositions from scratch.