Differencing Gradients

I experimented with gradients recently, and discovered a neat way to mix them.
If you create a series gradients, each on its own layer, with blending mode set to difference, you'd see them combine with each other. They kinda inverse where they overlap, and experimenting with different ones you can make all kinds of neat things. This is one I
did in studying gradient. There are probably far more complicated and more interesting designs; I just gradually gained an aim with this one, so I didn't stray from what I had begun to envision.

Image>Adjustments> Levels... is a powerful tool if you practice using it. It can help you give cool colors to abstract art. Try changing the red, green, and blue values (from the RGB dropdown menu) in relation to each other. You get flame red,orange, and yellow if you give red 0-85, green 85-190, and 190-255, without moving the gray bias arrow.
I've previously talked about how levels can imrove quality; it can create something entirely new, too. I'll probably add some stuff to this pic later- you can always fine something neat to add; just don't limit yourself to a specific tool/technique or part of the image. Do random stuff; after a while, go back to old things and see if you have new ideas!