Northern Lights Curtain (2D)

This 2D simulator repaints the aurora as pure light rather than plasma physics: layered noise-driven ribbons drift sideways over a silhouette skyline of snowy mountains and pines, mimicking how a long-exposure photograph compresses the shimmering curtain into soft glowing streaks. Pick a colour theme, tune drift speed and brightness, add more ribbons for a denser curtain, and drag across the sky to pan the view — a light-scattering and colour-mixing companion to the full 3D scene.