Random BackGround is a slideshow app that can cycle through any folders of images you have for your desktop backgrounds.Random BackGround features an intuitive interface. You start by using the Windows Explorer looking section to find the folder you want to use. Then, simply choose a time to rotate your images from as little as ten seconds to as long as one day. You can optionally fill, fit, stretch, tile or center your images and even choose a background color.Finally, there are settings to run on startup, associate with images and unique to screen. We admit we're not clear on those last two choices.Random BackGround, as you can see in the screenshot below, makes turning all your photos into a slideshow about as simple as we've seen. The app is small and seems to be light on resources.