this tutorial is about how to make cool abstract background, but this tutorial is not for beginner. because it it need advanced technique to modify the image. try these steps:
1. make new file with black as background
3. then fill with white, and turn down the opacity, then make outer line around that circles
4. copy the circle shapes 3 or more ( up to you)
5. for the copy layers, make it blur
6. then mak a new layer and fill with rainbow gradients
7. then change layer mode from normal into overlay....Finish
for further details, check this out:









