I took the liberty of creating simple, basic background images for use with the yMenu that recently won the menu contest hosted here by wololo. I love Kingdom Hearts as much as the next guy, but I'm sorry, I prefer something a little more simplistic for my VHBL backgrounds.
There are 6 images, all of which are the same, except the color of the wallpapers change. If you put all of them in the save folders with the new VHBL files, the backgrounds will alternate in a rainbow-esque fashion. It is quite nice and simple.
Here is the link. Just save each of the images as "bg_x", where "x" is a number starting from 0 and going up, into your save folder and upload! http://imgur.com/a/OC9JR