Three lights,possibly single or part of object hovered over treeline changing color,and shape.

I was in my early teens.My mother,father,and I noticed a strange set of lights over the treetops across the road.We lived in the country where there was alot of open area.These lights formed a triangle and were pulsing and changing shape and color.Living near the county airport we called to see if there were any aircraft in the area.After they told us none then we called the sheriffs department.They sent someone to investigate and he saw the object/objects as we had.He had not ever seen anything of this sort either.He drove to investigate and as he approached the area where the object was hovering it rose up and shot to the north at a very rapid pace.We all agreed that we had never seen anything of this sort before and probably would never again.This occured in about 1hrs. time.
Date is approximate.  PD