Recently I've been seeing a type of 'rainbow' effect used on pictures or in headers of designs. I was wondering does anybody know a tutorial where I could learn this effect? Thanks.

Recently I've been seeing a type of 'rainbow' effect used on pictures or in headers of designs. I was wondering does anybody know a tutorial where I could learn this effect? Thanks.
an example would help us?
http://mikkoliini.deviantart.com/art...wish-108496928 - not that detailed but you get the idea, or like Simon's design where the header had that rainbow effect.
theres two ways you can do it.
Make a lot of rectangles and change the colour. of each. tedious but it does the job.
secondly, draw a rectangle go to gradient overlay and there is a drop down menu. It should say something like solid. click it and select the other thing then change the colour. try fiddling with it.
sorry i cant find any tutorials
Alright, thanks.
Thank you so much!
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