An animated SVG composition recreates Sol Lewitt’s circle drawings by layering two sets of thin, colored lines. Vertical lines and horizontal lines are drawn as rectangles, each clipped by a circular mask that alternately reveals or hides the center. The line thickness and spacing incrementally increase each frame, cycling from fine grids to bold strokes. The animation uses raw `document.createElementNS` for SVG elements, `window.requestAnimationFrame` for looping, and masks defined with `url(#mask-id)`.