Sighting of many craft by multiple witnesses on multiple nights, a demonstration.

This is a sighting that happened when I was a young child in the early to mid 1960's.  I was very young at the time and all I really remember about it was watching it with my mother and many neighbors over a several night period in the summer.  My guess is sometime around 1965. I would have been 5 or 6 years old at the time.  I know it happened over several nights because the neighbors gathered on the front lawn and sat in lawn chairs waiting each night for the "show".  I didn't remember this sighting from my childhood until I had a dream about it a few years ago.  At first I just figured it was a dream but it kept bugging me and stayed on my mind.  I eventually spoke to my sister who is 5 years older than me to see if she remembered anything like this and she immediately remembered the sighting.  We compared our memories of it and they are pretty much the same.
As for the sightings themselves, we watched them at night in the summer and it was dark so it had to be between 8 and 10PM each night.  Each night was clear with many stars in the sky.  I remember it was in the western sky and that several of the neighbors said it looked to be occurring over Ft. Devens near Ayer Massachusetts.  The sightings themselves were simply dots of light in the sky, similar in size to the stars except these were moving making dramatic turns and creating strange patterns in the sky.  From my prospective at the time, they were just putting on a show and in fact I remember someone saying it was quite a demonstration.  It seemed to be designed to get our attention. I also remember several people being very frightened by the display.  I'm not sure how many nights that this happened but it was several nights in a row as people came out of their houses expecting to see it each night.  I don't remember much about each night specifically, just that it happened over a several night period and everyone was amazed at the movements and wondered what kind of craft could move like that. 
Witness indicates that the date of the sighting is approximate.  PD