This example renders a stylized flag by dividing the browser viewport into three horizontal bands of black, white, and green, then overlaying a red chevron shape. It uses raw SVG creation via the Document Object Model (`document.createElementNS`) and sets attributes directly on SVG `rect` and `path` elements. The flag’s dimensions adapt to the full window size, and the chevron is drawn with an absolute path command. No external libraries are used, only native JavaScript and SVG APIs.