leftlanelunatic

hello,im new here.guess what my dumb self did?
i took a phillips screw driver and inseretd it into the area where the red and green light was.thinking,and im a dumb A!!,that the small diagnostic screw was there.without looking!!!i saw an electrical flash.
NOW MY CAR WON'T START!!!!
It turns over and ALL the lights and whistles work.
WHAT DO I DO TO FIX what I did wrong,like a dumby.
please help.i am a layman.