This piece recreates Sol LeWitt’s vertical line drawing by rendering 100 horizontal and 100 vertical SVG rectangles across the full viewport. A circular mask, defined with two SVG `<mask>` elements, restricts each set of lines to a central ring: white lines appear inside the circle, while black lines fill the area outside it. The code builds all elements imperatively using `document.createElementNS` and `setAttribute`, with no D3 methods applied despite the library being imported. The result is a crisp, geometric interplay of line orientation and masked contrast.