This example shows basic geometric shapes—circles, rectangles, lines, and a path—rendered in an SVG canvas, with some shapes grouped and styled through CSS. The SVG markup defines the shapes’ positions, sizes, and inline fill colors, while an external stylesheet applies stroke properties and line-join rounding to elements within the `lines` class. The page uses no JavaScript libraries; it relies solely on static HTML, SVG, and CSS, as visible in the provided `index.html` and `styles.css` files.