This example reproduces a Sol LeWitt art piece in a vertical variant, displaying a grid of thin vertical rectangles overlaid on a full-screen SVG. The code creates a single visual pattern using two circular masks centered on the viewport, each defined with a white rectangle and black circle via the SVG `mask` element. One hundred narrow rectangles are then rendered across the screen using `document.createElementNS`, with the masks selectively revealing portions of the grid. The artwork uses no external libraries, relying solely on native SVG DOM manipulation within a script.