11. Create New Document any size you want ,with white background.

2. Now set Foreground Color to #009933, Background Color to #000000 and apply Filter>Render>Clouds:



3. Switch Background Color to Foregroung and go to Filter>Texture>Stained Glass:



You should get this result



4. Going to Filter>Artistic>Plastic Warp:

5. Apply Image>Adjustments>Hue/Saturation:



Your done, I hope it came out good for you.