This example demonstrates inverse masking with SVG, where intersecting horizontal and vertical striped rectangles reveal a circular cutout at the center. Two masks are defined: one with a white circle on a transparent background, and another with a black circle over a white rectangle. The code builds 100 horizontal and 100 vertical rectangle strips, applying each mask to create a cross-hatch effect where the circle appears transparent. It uses plain JavaScript to manipulate SVG elements directly, with the `<mask>` element and `url(#...)` references controlling visibility.