Yes, I hate these, but I was bored and thought making one would be fun. Also, I don't like how most of them are horribly clashy colors smudged until it's a disgusting mess of ugly colors and I thought we needed a nice pretty rainbow one. I also put fur texture in there 'cuz I felt like it. >.>
Choose a background-thingy by clicking the dot next to the name of the layer you want. (right now there's nothing beneath the black, so, unless you want white, you must choose something.)
Layer 2 - Basic Rainbow
Layer 3 - Pastel Rainbow
Layer 4 - Brown Fur