Simple I-Phone app for testing

I need a simple Iphone app for testing an idea. If my test works then this project will become a large one. The app is simple, just turn it on and when it comes up, the boarder is lighted up. The width of the boarder is about 3/8 of an inch wide (about 9 mm) the light needs to be as bright as it can be. The center part needs to remain black and turned off. Some place there needs to be a simple off button. I have enclosed a pic to show an example how I want it to be. The little red dot is simply the off button. As to the on button or the icon for the app, again it can be a simple little dot or anything. I just need to be able to turn it on and off. After I do the testing and if it is successful, then the project will be much larger but for now, I just need this little app for a few tests.