HTML Starter
This example shows a simple smiling face drawn as SVG shapes: a yellow circle for the head, a black circle for the left eye, and an arc for the mouth. The visualization presents static geometric elements without any data input or interaction. The code uses D3 v5’s `select` to target the SVG container, `append` to create circles, and the `arc` generator to produce the curved mouth path. The viewBox is set via the SVG’s width and height attributes, with the face centered at (400, 450). The React framework is referenced in the metadata, but the actual implementation relies on plain HTML and JavaScript with D3.