This reproduction of a Sol LeWitt artwork uses an SVG generated entirely through the Document Object Model (DOM) API. It shows a grid of horizontal and vertical stripes that are selectively revealed through two circular masks centered on the canvas. The first mask applies a black circle to create a cutout in the horizontal stripes, while the second uses a white circle to overlay vertical stripes in the same region. The code builds elements dynamically, setting width and height to the full viewport, and employs the `createElementNS` method to construct SVG nodes for masks, rectangles, and circles.