This example creates a smiling face using basic SVG shapes—two circles for the eyes, a larger circle for the head, and an arc for the mouth—all positioned with fixed coordinates. The code uses D3.js v5 selection methods like `svg.append` and `.attr` to build the elements, alongside the `d3.arc` generator to define the mouth’s path based on inner and outer radii and start/end angles. The SVG canvas is 960 by 500 pixels, with styling applied via an external stylesheet.