For anyone who's interested in full-screen colored grids, I threw them together in CSS.
Green (horizontal) – http://codepen.io/ChristianBundy/full/iaAcq
Purple (vertical) – http://codepen.io/ChristianBundy/full/moshj/
Green (horizontal) – http://codepen.io/ChristianBundy/full/iaAcq
Purple (vertical) – http://codepen.io/ChristianBundy/full/moshj/