This example demonstrates basic SVG shape rendering and styling within an HTML page, displaying circles, rectangles, lines, and paths at fixed coordinates. The visualization loads D3.js via UNPKG but primarily relies on raw SVG elements with presentation attributes for colors, strokes, and transforms. A stylesheet defines the SVG path's green stroke and stroke-width through CSS classes. The example serves as a minimal introduction to combining SVG markup with imported JavaScript libraries and external CSS, though it does not yet showcase D3's data-binding or dynamic layout capabilities.