This example demonstrates an SVG visualization that fills the browser window and redraws its content whenever the window is resized. It shows a green X shape composed of two crossing lines, whose coordinates are recalculated to match the container's current dimensions. The code uses `d3.select` to append an SVG element and relies on CSS `position: fixed` with `clientWidth` and `clientHeight` to determine the size. Window resize events trigger the `redraw` function, which updates the SVG's width, height, and line positions using D3's `.attr` methods.