This example reproduces a Sol LeWitt art piece using only JavaScript and the SVG API. A central circular mask reveals a grid of horizontal black lines in the center of the viewport, while a second inverted mask allows vertical black lines to appear only outside the same circle, creating a striking contrast. The code dynamically creates all SVG elements—including masks, rectangles, and circles—based on the browser window dimensions, generating 100 horizontal and 100 vertical stripes that intersect in a pattern defined by the two masks.