Okay, I made this large picture on yellow paper. Now, the picture is basically a girl and a chair, and invovles the girl running about the chair. It's basically an animation sort of idea. Now, should I cut the scenes and paste it onto a red piece of colored paper, or just leave it?

Yellow sounds fine to me. A red backround might set an angry mood for it. Yellow is much calmer and more light-hearted.

I agree with linkfreak131. You should just leave it on yellow. :)