This example reproduces a Sol LeWitt-inspired geometric composition using two overlapping grids of thin horizontal and vertical rectangles. The horizontal grid is masked to reveal a circular window, while the vertical grid uses an inverted mask, creating a contrasting interplay of lines within and around the central circle. The visualization is rendered as an SVG using D3 v7’s `select`, `range`, and `join` methods, with `mask` elements defining the circular cutouts over a full-screen canvas.