My friend and I were in the third grade and we were sleeping in my back yard when the craft flew over down and to the right of the circular clearing of trees we were sleeping under. we were both scared so I told her it was a government plane since we were so close to D.C

it was shapped kinda like a curved edge triangle and was solid black. it had four visable lights, one purple, near the 'top'edge, one green in one corner, one a light blue in the other and a red blinking on in the middle.  There was NO sound.  My friend I simply watched it fly over us and out of view. it was a steady movement and left our sigh shortly after entering it.  As far as we know nothing happened. we just watched it fly over.  From where were the span of the object in the sky was 2-5 meteres across, suggesting it was very very large if we had been up close.  At the time we were both afraid I dismissed it as a government experiment and we slept. (down below it says contacted by an investigator, there isnt much else than this, other than a picture in my sketch book.)