This example reproduces a Sol LeWitt-inspired geometric composition using SVG. It shows layered horizontal and vertical strips of color intersecting within two circular masks, creating a dynamic pattern of bars confined to circular regions. The rendering uses the SVG DOM API, creating equal-width rectangle strips for vertical and horizontal bars, with a `mask` element defining a circular aperture in the center. Each strip is added via JavaScript loops, and the masks invert their fill colors to alternate which sets of bars remain visible. The code relies entirely on native browser APIs, without external libraries.