I watched a documentary that introduced SR. Ok, I don't know the theory very mathematically. But what I know of and the documentary says is that time itself slows down to prevent the maximum speed, c, to be broken. It said that if time doesn't slows down, when we ride a rocket moving close to c,lets say 99%, and if we'd move at a some other speed on the rocket , lets say 2% of c, the total speed of us is 101% which means time has to slow down so that c may never be reach. (Enlighten me on this if it is wrong.) Anyways, my question is if light travels at the speed of light, how would time (in the perspective of light) behave?