This example demonstrates a minimal D3 starter template that renders a collection of rectangles in an SVG. The code uses D3’s `select` and `selectAll` with the data-join pattern to bind an array of generated objects (each with height and width properties) to SVG `rect` elements, positioning them at the origin. It relies on D3 v7, loaded via a CDN, and a `bundle.js` file, while the page also includes an embedded YouTube tutorial. No scales, axes, or interactions are present; it simply shows foundational data-binding and element creation.