This example generates a grid of horizontal and vertical bars overlaid with two circular masks, creating a circular portal where the bars are visible and a contrasting ring where the orientation flips. Built with D3.js, it uses `select` and `range` to create 35 rectangles for each axis, positioning them with `attr` calls. The SVG rendering applies `mask` elements with `rect` and `circle` shapes to control visibility. The artwork reinterprets Sol LeWitt’s vertical line concept, using the browser’s `innerWidth` and `innerHeight` for a full-screen composition.