Traffic lights in Lego city. Educational movie for kids.

So-o-o-o-o many cars!
And someone here is just hurrying to cross the road.
But there’s too many cars, and they all move very fast.
Another road crossing attempt was unsuccessful. Moving cars will not afford our little boy to cross the road, because this is the way for cars, not for pedestrians.
And here we see a traffic light, that is used for road crossing by pedestrians.
Red traffic light is on, so only cars are moving now.
But then traffic light switches to green, and all the cars stop.
Now we can cross the road for sure.