This example uses D3.js v5 to draw a simple face on an SVG canvas. The code selects an SVG element via `d3.select` and reads its width and height attributes, then appends a single circle with a radius of 200 pixels, centered at the midpoint of the viewport. The visualization demonstrates basic SVG shape generation and attribute manipulation using D3’s `attr` method, with the circle representing the face’s outline. No facial features are added beyond the circle, and the rendering relies on the SVG primitive directly.