Backround Cycler is a tool that lets you change your desktop wallpaper every so often, automatically, and without changing anything of the operating system configuration.
Backround Cycler works in the following way: open the program configuration window and select the Pictures Folder option, and then Load Folder, where you can add the images stored in a folder. Then click on Load File and you have changed the image for a new one.
To establish the time parameters you need to select Behavior. In case the new image is too small, the program will restructure it automatically.