The context of the following conversation is Remy pushed the ball too far, so it rolled out into the street.:
Remy says Oh no my ball! It rolled into the street!.
The friend responds It's too busy to go and get it right now! Wait until there is a red light.
Remy responds Will I have time to run and get it?.
The friend responds Yes if you hurry! Get ready to go and I will let you know when there is a red light.
Remy responds OK.
The friend responds Go! It's a red light.