My iPhone screen just turned fully green?

Okay, so my iPhone screen just turned fully green with one slim layer of black at the bottom and it has been like this for about 30-35 minutes! I don't know why it is doing this but my school is technical and I have school tomorrow and need to use my phone I also need the answer on how to fix it in about 10 minutes Please Help!

If its on iOS 4. X its the yellow screen of death and you let it charge a little bit then hold home and the lock button til it resets then it should work fine.

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