SVG Fundamentals
This example demonstrates fundamental SVG shape elements in a web page, using static circles and a rectangle to illustrate basic attributes. The code uses plain HTML and JavaScript within a minimal setup, with an SVG canvas of 900 by 500 pixels. It shows a default black circle, a red-filled circle at adjusted coordinates, and a green-stroked rectangle with a thick stroke width of 20. The example highlights how CSS and JavaScript interact with inline SVG markup.