This example reproduces Sol LeWitt’s Wall Drawing 370 using D3.js and SVG. It draws a grid of 100 horizontal and 100 vertical thin rectangles that span the full width and height of the browser window. Two SVG masks—one featuring a large circular cutout and another with a smaller black circle on a white background—are applied to the respective rectangle groups, creating an overlapping circular reveal in the center. The code uses D3’s `select`, `range`, `symbol`, and `symbols` APIs to generate the shapes and manage data binding.