This fork of a Sol LeWitt reproduction uses SVG masks to create a circular window that reveals a grid of horizontal lines. A second layered mask with inverted colors displays vertical lines within the same circle, producing an interlocking geometric pattern. The code builds the SVG dynamically with `document.createElementNS`, setting `mask` attributes on rectangles to control visibility. The piece references LeWitt’s wall drawings, translating his algorithmic instruction-based art into a web-native form.