Hi,
This is my first post on the site and it is a tutorial so here we go:
1. Create a new picture (File>New) Set dimesions to 500x500 (pixels).
2. Filter>Render>Clouds
3. Filter>Render>Difference Clouds
4. Image>Adjustments>Invert (Ctrl+I)
5. Image>Adjustments>Levels (Ctrl+L). Set input levels to: 0 0.10 255
Now click ok.
6. Finally go to Image>Adjestments>Hue/Saturation. Set to: Hue 238 Saturation 50 Lightness 0.
Final Product:
Hope you like it!
Thanks...