This example reproduces a Sol LeWitt-style geometric composition using two overlapping grid systems: one of horizontal strips and another of vertical strips. Circular SVG masks control visibility, revealing each set of lines only within or outside a central circle. The code builds the entire scene with raw JavaScript and the SVG DOM API, using `createElementNS` and `setAttribute` to generate rectangles and masks dynamically. The artwork responds to the browser window size, adapting its dimensions to the full viewport.