Hey and welcome to CC. First of all I just uploaded a picture of a cake I just finished yesterday that is both giraffe and zebra print.
Basically once your cake is covered, you just roll out your stripe color and randomly cut different shaped stripes. If you look at a photo of a design on here that you like, you can copy the stripe idea for size and shape.
It's fairly easy especially if you have like a pizza cutter to cut your stripes out.
Theres alot of different ways on here in the photos.