A grid of thin black horizontal and vertical strips forms a woven texture across the full viewport. Two circular masks reveal the underlying pattern: the first mask, created with a white rectangle and black circle, isolates a circular region where vertical strips appear; the second mask, using a white circle on a transparent background, exposes horizontal strips within its boundary. The example uses D3 selections with `join` and `range` to generate 100 rectangles per orientation, and React’s UMD build to mount the document, rendering entirely as SVG.