You will probably not see the paint over on the final image. Here what I've painted.







Drag this layer (layer 2) down.



And set the mode to Diffusion. I never use this mode in my works, but this time I think it looks very beautiful, like flow of particles.



Use some styling on our Diffused layer.







Thaw it already looks good, I've changes the opacity.



Doing this tutorial I've peaked on the sample only once, only to match the colors and to define the position.



Now this part of the image: a Big transparent circle.



Make a rounded selection.