How come I see green rays at night?

When it is pitch black sometimes i just see these green i cant even explain it. picture a sonar radar in a submarine.. its like that. i googled this but cant find it anywhere and idk what it is.. Its like a green up and down curved bar that moves from the right side of my eyesight to the left in the dark and green circles pop up and stuff. I'm being serious. The only thing I found on google was other stuff..