This example demonstrates how SVG masks can create geometric patterns by layering horizontal and vertical stripes over a circular cutout. The code manually constructs SVG elements using the DOM API, creating a full-screen SVG with two masks: one revealing a circle of horizontal stripes and another revealing the inverse. One hundred turquoise rectangles are generated for each orientation, with the masks controlling visibility through white and black fill values. The visualization highlights fundamental SVG manipulation techniques without relying on a visualization library, though D3 is listed as a dependency.