This interactive SVG artwork reproduces a Sol LeWitt-inspired geometric composition using vanilla JavaScript and the SVG DOM API. It displays a grid of vertical rectangles overlaid with three white circles, plus a second grid of horizontal rectangles masked by three additional circles via SVG `<mask>` elements. The code generates 200 rectangles per grid programmatically, sizes elements relative to the window dimensions, and calls the Web Animations API’s `animate()` method with empty keyframes, preparing the shapes for potential motion while no visible animation occurs.