Rainbow Layered Cake

This cake is not to show off my creativity with decorating as you can see, its just simple butter cream frosting and I grinded parts of the cake that where cut off to make rainbow type sprinkles, nothing special.

The point of this cake was to try and do the rainbow colored layers which worked!!!!

I got the idea from [link]

And the tutorial on how to do it from [link]
Thank you sooo much! It worked out perfectly. Now I cant wait to do it will a real decorated cake. Once I do ill be sure to let you know