This example reproduces a Sol LeWitt wall drawing using D3.js. It shows a grid of horizontal and vertical bars intersecting to form a circular emblem at the center, created by masking the bars with a geometric symbol path. The SVG rendering uses `d3.select`, `d3.range`, `d3.symbol`, and `d3.symbols` to generate and mask the rectangular bar elements. Two separate mask groups define the circular shape, with one mask inverting the fill to combine the bars into a single composed form.