A traffic light you seen change to green
a fresh green light is when the traffic light has just turned from red to green
Fresh green light
the red light. it means STOP.
Traffic approaching the light is to stop. If the way is clear, traffic can then proceed through the intersection.
I am not excactly 100% sure but I think it means the fresh green light is a kind of headlight
Green
The color red
It means to stop
Amber (or red) in a traffic light sequence means "stop," put the brakes on! Green means "go;" and yellow signifies that the traffic light is about to turn red (or amber), so you should start to slow down and prepare to stop.
To humans RED means stop or danger in our brains.
On traffic lights it means slow down.
Amber in the traffic signal means caution. Generally, it is best to stop on an amber light.