This example recreates Sol LeWitt’s geometric wall drawings using layered SVG masks and rotating stripes. Alternating purple and dark-purple horizontal and vertical bands are clipped to two complementary circular masks, producing a crossing pattern inside a central ring while the outer area remains solid. The horizontal bands rotate continuously via CSS keyframe animations. The code builds all elements dynamically with vanilla JavaScript, using the SVG `mask`, `rect`, and `circle` APIs without any external libraries.