City of god shot changes

In the city of god to show changes to another year or time there is a change of the shot either a swivel to the next scene or a fade out or in.the first one we see is when the boy is stood in the middle of the street and the camera swivels anti-clockwise to show it is going back in time and goes back to when the teenager is a young boy. we know we have gone back in time because the colour in the scene changes and the music changes and become more upbeat and the colour changes to a bright bronze.the second one is when a child gets older and i firing a gun and each time he fires his gun there is a flash and after the flash he has got a little bit older until he is an adult. showing his life of crime as a child through to adulthood.the second flashback is going forward and the first flashback is going backwards. they are both showing changes in age and time.