This example reproduces a Sol LeWitt-inspired geometric composition using D3. It renders a grid of horizontal and vertical SVG rectangles, each masked to reveal a circular cutout in the center. The visualization uses two overlapping D3 selections with `mask` attributes to create alternating stripes visible only in the circular region. The code leverages D3’s `select`, `range`, and data joins to generate elements efficiently. The full-screen SVG canvas displays 100 horizontal and vertical bands, with the second mask inverting the visibility pattern to achieve the final layered effect.