According to our current understanding of physics, if an object were to travel at the speed of light, time would appear to stand still for that object. This concept is known as time dilation. As an object with mass approaches the speed of light, time slows down relative to an observer who is at rest.
However, from the perspective of the object itself, time would continue to pass normally. This means that if you were somehow able to travel at the speed of light, you would experience time passing normally while everything around you appears to be moving in fast forward. From your point of view, you would not be able to "get back" to the same place in space and time because time would appear to stand still.
It's important to note that according to the theory of relativity, an object with mass cannot reach or exceed the speed of light. The equations of relativity become undefined when an object's velocity reaches the speed of light. Therefore, discussing what would happen if an object could travel at or faster than the speed of light is purely speculative and goes beyond our current scientific understanding.