one in four trillion

this film is a representation of how we pass through time like we are to live here forever, by showing that life is growing but time is constant. then life finally met time and he thinks that it will all start again and he goes back in time and his window of existence shuts since we being born on this world is one in four trillion chance that that all our ancestors met, and right sperm fused etc., and as he goes back in time thinking it will all start again, it won't.