This example recreates a Sol LeWitt-inspired drawing using D3 and SVG. It shows a grid of horizontal and vertical bars that are partially hidden by two circular masks, creating a pattern of lines that fade in and out of view. The code uses D3’s `select`, `append`, `range`, and `.join()` API to generate the bars and masks, with the masks defined as SVG elements containing rectangles and circles. The visualization is rendered entirely with vector graphics, using a full-window canvas and a data-driven approach to build the repeating line structure.