Create new file, 500 x 500 is ok.
1) Press X and D to reset colors.x
2) Use Filter -> Render -> Clouds.
3) Then Filter -> Pixelate -> Mezzoint -> Long Strokes.
4) Now go to Filter -> Blur -> Radial Blur and use this settings: Amount: 100, Method: Zoom, Quality: Best.
5) Use Filter -> Distort -> Twirl and set 200.
6) Press CTRL + J and use Filter -> Distort -> Twirl and set -400 DONT FORGET THE "-"
7) Change Blending Mode to Lighten.
8) Ctrl E to merge down.
IT LOOKS GOOD!!! I heard it! but let it Colorize. Press Ctrl U and make sure you check Colorize.
You can stop here... or you can follow this optionals steps to make it feel like a Portal (like Startrek or Babylon5)
9) Go to Filter -> Distort -> Twirl and set it to 200
Voila... it look greats I know.
More Tutorials: 
