Step 1
Make a new document, Set to any size you like
Select the Gradient Tool. Now set the Chrome gradient:
Set Difference blending change:
Step 2
Go completely crazy and make
tons of gradient lines untill you get something like this
Step 3
Now press CNTRL+U and this is where you get creative and make your own color. Try using saturation aswell.
Step 4
Duplicate the layer. Go to Edit>Transform>Rotate 90 CW. Change the blending from Normal to Screen. And you will have something like this:
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