To download the different types of screen saver using net, first to navigate in to "www.wallsaverapp.com". In this screen you have a "download" button that appears in the right of the screen. After download this program, run the program. Now you have to download different types of screen saver in website like "www.macupdate.com". In this site you can search different types of screen savers. Enter the website and type "matrix saver" in the search dialog box. Download the required screen saver. Save the file in your system. Go to desktop properties and select the screen saver option and select the downloaded screen saver. Now you get a new and different screen saver.