This example demonstrates a Sol LeWitt-inspired geometric composition rendered entirely in SVG. It shows a circular mask revealing a series of horizontal stripes across the full viewport. The code creates the mask using a white rectangle and a black circle, then draws 100 rectangles, each 20 pixels apart, applying the mask via the `url(#circle-mask)` reference. The implementation uses vanilla JavaScript DOM manipulation with `createElementNS` and `setAttribute`, avoiding any external libraries. The visualization is static, with the masked stripes forming the central visual effect against a clean, margin-free background.