This screensaver displays a slowly-moving sky of clouds in perspective. The clouds mostly resemble forms of stratus and cumulostratus because these occur in layers, whereas cumulonimbus clouds are fully three-dimensional and hence much harder for a computer to produce pictures of. Press Q or Escape to quit the program.
Copy files into your Windows folder to install.
Try it now! - press open/run if the browser prompts you (Windows 8 sometimes requires you to click 'More info' first).