This example uses SVG masks to create a geometric pattern of horizontal and vertical stripes that disappear within a circular region. Two complementary masks (`circle-mask` and `circle-mask2`) control which stripes are visible, with the horizontal lines masked by a black circle and the vertical lines masked by its inverse. All elements are created dynamically using the native `document.createElementNS` API, rendering 100 rectangles in each direction without any external libraries.