This example reproduces a Sol LeWitt art piece by generating a grid of horizontal and vertical bands that intersect within a circular boundary. It shows how simple geometric repetition creates a complex moiré-like pattern, with the circle acting as a focal point where the two orientations overlap. The code builds SVG elements dynamically using raw JavaScript and the DOM API, drawing rectangles at fixed 20-pixel intervals and applying two SVG masks—one to reveal the horizontal stripes inside the circle and another to show vertical stripes outside it. It imports `selection` from the D3 library, though the rendering relies entirely on manual SVG creation rather than D3’s data-binding methods.