title: Changing Background Color of UIView
body: <p>See where that ugly yellow is? I need that color to be changing... a lot. Kind of like a trippy kalidascope thing, but with one color the entire time. A lot like the default OS X Spectrum screensaver. How should I go about doing this? Objective-C would seem like a huge CPU hog. Would it be possible for me to put an OpenGL background into something like this? Would love a push in the right direction.</p>
  
  <p><img src="https://i.stack.imgur.com/o1HXi.png" alt="enter image description here"></p>