If you want to make your own looping wallpaper you just need a “long” picture best is probably 3200 x 480.
You just have to crop that to 4 parts and then make a new text file in the same folder where you have your pics with the same
name as your wallpapers but with filetype “.desktop” and add this kind of code to that file:
Name=Your WP name
Thanks to MrThunderfield about this tip.