Haciendo una cara
This example builds a simple geometric face using SVG primitives composed with the D3.js selection and arc APIs. It centers the composition on a black background, adding a white circular head, a red circular bindi, two black eye circles, and a green smile generated with `d3.arc()` path geometry. The design demonstrates basic SVG attributes like `r`, `cx`, `cy`, and `d` within a translated coordinate system, using D3 v7 to append elements and apply styling.