Big Rectangular flying object that changed directionn August 13, 2016. About 2:15 a.m.I was watching the Perseid Meteor shower from my home. I saw what I thought was an airplane. It had red, green and blue flashing lights. We live about 7 miles west of Vance Brand Airport in unincorporated Longmont, so at first I thought it was OK. Then it grew larger, moving from a direct northeast direction then turned west where it came closer to me and larger in the sky. I noticed the big boxy shape, like a large rectangle. This did not look like a normal airplane to me at all! It was too big and square. I had a sense of dread as it grew larger and said many prayers, mostly anti-abduction! Really felt uneasy! Then, it finally flew back east of my property. If anyone has any insights as to what this plane was, I'd be glad to hear them!