what is time?

according to the dictionary time is defined as "the system of those sequential relations that any event has to any other, as past, present, or future; indefinite and continuous duration regarded as that in which events succeed one-another."

Sir Issac Newton believed in the idea that time is a fundamental part of the structure of the universe, as a dimension that events occur within in sequence.
on the other side there is a belief that time is not something in which events occur and is not measureable but is instead combined with space and numbers for humans to compare events.

these concepts are a good base in which to find a narrative or inspiration.