This example shows a generative art piece inspired by Sol LeWitt, featuring a grid of animated vertical rectangles that shift downward while a white circle overlays the center. A second set of horizontal rectangles is clipped by a circular mask, creating a layered geometric composition. The animation uses the Web Animations API’s `element.animate()` with random durations and translations, while SVG elements are created dynamically via `document.createElementNS`. Random RGB fills are assigned to each rectangle, and the mask is defined using SVG `<mask>` and `<circle>` elements.