I was picking my son 9 years from the bus station returning from vacation.Comming back home with my car and my son, i stop to the trafic light. When are waiting upon the trafic light, I see the sky strong light like star apearence.I told my son what beatiful stars on sky are, suddenly i saw that the stars light are changing position and are brighter. Then i told my son that are helicopters.In the left side of our view where 2 lights on horizontal line and other 3 in triangle formation. the lights are become stronger and move from NW to N all together.The color of my trafic light changed to green , I start my car i saw the the lights are move and disapear on the sky after 4 minutes.After that I realize that are defininetly not helicopters.