I placed the ball on the canvas and duplicated it. I moved the transfom center of the duplicated ball to the center of the canvas, resized this ball a little, moved it down a little and rotated it some degrees.
step 3 of 9
After having resized, moved and rotated the duplicated ball, and without clicking anywhere, CTRL+SHIFT+ALT+T did the trick, repeating the action ad infinitum...
step 4 of 9
I put all the ball into a folder, duplicated it, converted to smart object and rasterized it. I duplicated the new object, flipped it horizontally and vertically and put these objects into a new folder.
step 5 of 9
Using the same process in the step 2, I created a new object.
step 6 of 9
I duplicated the new object, flipped it horizontally and vertically and moved it to the other side of the canvas.
step 7 of 9
For the background I used two huge red balls to wich I applied 25 px gaussian blur.
step 8 of 9
I placed two more balls over the big ones, and applied 15 px gaussian blur.
step 9 of 9
To create the "sun" I simply used the smudge tool on a new red ball and applied some gaussian blur too.