SVG basic template
This example shows how to draw basic SVG shapes—a circle, rectangle, line, and path—within a static 900×400 viewport. It relies on raw SVG elements embedded directly in the HTML, using inline attributes like `cx`, `r`, `stroke`, and `fill` to style each shape with colors such as red, green, and violet. No JavaScript libraries or data sources are involved; the visualization simply demonstrates the fundamental syntax of SVG markup for geometric primitives and paths in a React-free HTML page.