I have a screen saver that I use in my iMac 2010 called WebSaver. It allows me to use a URL webcam for my screensaver. In my case its of a beach and goregeous in the day. At night its dark since it is night so I want to automate the change of the screen saver to something like the iTunes one or any other standard screensaver. I thought there might be a way to do this in Automator, but I am not that skilled to do this on my own. Any help on how this could be automatically switched at night from one OSX screensaver to another? Maybe using iCal alarms and have them run scripts? Any help would be greatly appreciated.