This example shows a minimal SVG scene with two circles and two rectangles arranged in a grid on a 960×500 canvas. The first circle and rectangle use default black fills, while the second pair uses red and green fills specified via inline SVG attributes. It demonstrates a bare-bones HTML page that renders static vector shapes without any JavaScript libraries or interactive behavior. The code uses raw SVG elements directly in the HTML markup, with a simple stylesheet that removes default body margins and hides overflow.