This script runs in the background and changes wallpapers at regular intervals. It is capable of monitoring more than one directories recursively [upto a configured depth] for images. It randomizes the images and set them as desktop background.
Although it runs in the background it accepts some commands to change the configuration at run time. Some of the commands are.
Next, Back, Pause, Play,Stop.
It reduces its priority, so that it does not consume much of cpu time.