This example reproduces a Sol LeWitt-style geometric composition, showing a grid of horizontal and vertical bars that are visible only through two circular masks. One mask reveals a full circle of bars, while a second, inverted mask creates a contrasting ring effect. The artwork is rendered entirely with browser-native SVG APIs, using `document.createElementNS` to construct rectangles, masks, and circles dynamically. The code sets up a white circle against a black background in the first mask and the inverse in the second, then applies these masks to two sets of 100 striped rectangles. No external libraries are used; the piece relies on pure SVG manipulation and JavaScript loops.