This example shows a simple yellow face constructed entirely with SVG shapes, using D3.js to generate a circular head, two eyes, and an arc-based mouth centered on the canvas. The code imports `select` and `arc` from the d3 module, manipulates SVG attributes directly, and positions elements based on the viewport height and width. The mouth uses the `arc` generator with specified inner and outer radii and angular ranges, while circles are appended for the face and eyes. The example demonstrates basic D3 selection, attribute setting, and generator usage without any data binding.