This example demonstrates the foundational graphical primitives of SVG (Scalable Vector Graphics) within a minimal HTML page. It shows four basic shapes: two circles filled in red and blue, a large rectangular border in green, and a thick navy diagonal line. The scene is rendered directly by the browser’s SVG engine using static markup, with no JavaScript or external libraries. The code declares an SVG canvas of 960 by 500 pixels and positions each shape via explicit coordinates and stroke or fill attributes, illustrating how raw SVG elements compose a simple geometric composition.