This example demonstrates a simple D3.js starter project that renders a yellow smiling face using basic SVG shapes. The code creates a large circle for the face, two smaller circles for the eyes, and an arc path for the mouth, all positioned relative to the SVG's width and height attributes. It uses D3 v7 selection methods such as `svg.append` and `.attr` to build the visualization, along with the `d3.arc` function to generate the mouth's curved path. The example serves as a minimal introduction to D3's core drawing capabilities.