This example demonstrates fundamental SVG shapes and styling by rendering two overlapping circles and a rectangle on a 900x500 canvas. The code uses plain HTML and CSS within an SVG container, showing how to set coordinates, dimensions, fill colors, and stroke properties for basic primitives. A red-filled circle and a blue-outlined rectangle with thick stroke width illustrate layered rendering and the difference between fill and stroke attributes. The example serves as a bare-bones introduction to SVG markup without external libraries or data sources.