Green Light Go, Red Light Stop

Another Matthew conversation:
Matthew: let's play green light go, red light stop. You have to start in there (in the kitchen). He says green light go, so I go. Then he says red light stop, so I stop. Then he says I might confuse you. Then he says, green light go-(I start to go), gopher, so I had to stop again. Silly kid. Says he seen it in a video.