This example uses raw SVG and DOM manipulation in JavaScript to create a striped composition with a circular cutout. A mask containing a black circle reveals vertical black rectangles across a white background, producing a lens-like effect. The code creates SVG elements directly without any library, instead relying on `document.createElementNS` and attribute setters. The 100 rectangles are evenly spaced, while the mask defines the visible circular region at the center of the canvas.