This example reproduces a Sol LeWitt wall drawing using SVG and D3.js v6.6.1. It displays a grid of horizontal and vertical stripes, masked by two overlapping circles to create a pattern of contrasting line directions. The code uses D3’s `select`, `range`, `.append`, `.attr`, `.data`, and `.join` APIs to construct the SVG elements directly. Two SVG masks (`circle-mask` and `circle-mask-2`) define the circular visibility regions, with the vertical lines visible inside the first circle and the horizontal lines visible inside the second. The drawing fills the entire browser window.