You'll need a version on photoshop,
A color scheme to make into a gradient and a little knowledge of photoshop.
Step 1Make your gradient by click on the gradient tool on your toolbar. See below.
Make a new blank document 350x467. Make a new gradient layer with your gradient. Once you've done that.
Step 2Go to your filters, gilter gallery and follow these steps.
Flllow the steps on the images and finally.
Step 3Now go to filters-distort and match my setting.
And boom you're done. This is how I did it.