I felt like experimenting today. I don't own any backdrops, so I tried creating one with the flash.
I used ordinary balloons as flash "gels". Next time, I'll try and find some cheaper quality balloons, perhaps the colors won't be quite as strong then.
I stuffed a clear plastic bag full of scrunched up clear cellophane paper to scatter the light.
Tried it all out on a very dark laundry wall and was ever so pleased with the result!
The tiny little pics don't do it justice, it actually worked quite well even though the colors were VERY strong. Backing away further (which I couldn't do) or introducing some more ambient light would also have helped to "dilute" the colors.