I'm looking through the geektool scripts and have been trying to come up with one of my own to create a shell for an idea I had. I want the background of the computer to change depending on the yahoo weather, which I currently have as a shell on the desktop. For example there'd be 10-15 pictures and say that when the output for current conditions is "Partly Cloudy" and the temperature is between lets say 65-80 degrees then an appropriate background picture would appear. Basically, the background would change depending on the outside weather.
Any ideas how to make this script? (Using the RSS from Yahoo of course)