noticed lights in the sky just above tree tops

MY aunt and her 2 children and me were outside, and we noticed these lights they were square like around this disk shaped object. The lights went in a sequencial motion around this disk almost one would fade out and the other come on. My aunt told us to get in the car and we would follow it. We followed it for a while but the disk just all of a sudden dissapeared. The craft did not make any noise,and it moved in a zig zag movement but when it dissapeared it just took off. My aunt called the police and asked them if they had had any reports of any thing that night and they said it was probably a weather ballon. I know different. This was in the 60's late if I remember correctly.
Date is approximate.  PD