This example reproduces a Sol LeWitt art piece using D3.js version 6 and SVG rendering. The visualization shows a grid of horizontal and vertical rectangles, with two circular masks creating a layered geometric pattern where the lines alternate visibility. The code employs `d3.select`, `d3.range`, and the `join` method to generate 100 rect elements for each orientation. SVG masks—defined with distinct IDs and circles of white and black fills—control which line segments appear within the overlapping circular regions.