My iPhone won't stop flickering?

Ok so I got a new phone during the summer the iPhone 4. I have to life case so nothing happens to it. I was in my room taking sefies and my phone freezes all of a sudden. I put it to charge and it turned white then I pressed the home an sleep button and it turned off. When I turned it on it won't stop flickering on the sides of my phone. Can some one please help me?

If the whole screen flickers only when you touch the screen, you may have turned on a setting that makes the screen flash whenever something "updates" like the time. This can be changed in the Security Settings. OR the power cable to the screen inside of the phone has a short and is messing with the light.

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