You can now have a background slideshow rather than a single static image. Here's how to set one up.
Step 1:
First upload the images for your slideshow, and select each of them in turn so that they show up in the Wallpaper Library (see the video above)
Step 2:
Next, open the Wallpaper Library, and check the tick-boxes of the images you want to appear in the slideshow
Step 3:
Click Save
Also see: