This example reproduces a Sol LeWitt wall drawing using D3.js to generate a grid of horizontal and vertical bars on an SVG canvas. The bars are masked by two circular regions, creating an intersection of striped patterns that reveal and conceal different areas of the composition. The code uses `d3.select` and `d3.range` to build the marks, and applies SVG `mask` elements with contrasting black-and-white rectangles and circles to shape the final visual. The rendering fills the entire browser window, with the artwork centered around a 200-pixel-radius circle.