2019-02-19 - Allentown, PA - Disk

My wife and I had just gotten into bed for the evening. She was reading a book while I was on my phone. We start hearing a gradual pulsating hum. It started soft then started actually vibrating the house. I went to the window and pulled up the shade. At first I didn't see anything and then my wife pointed out for me to look to the west. If I were to take an educated guess I would say it was maybe half a mile away and only a few hundred feet up. It was at first just hovering there. I noticed the lights were solid, no blinking or flashing. I can only describe it as a grid like elongated rectangle with multiple squares in it. The squares were red and blue and no apparent pattern. It was disk like in shape and very dark. We were in disbelief. It then started moving eastward. The pulsating hum stopped when it started moving. It wasn't moving very fast but very steady in direction. I lost sight of it as it flew over the houses. I am in the military and I have neve! r seen any aircraft like it. We didn't know what to think after it flew away. I couldn't sleep, I tossed and turned all night. Today while at work I kept thinking I had to tell someone about this. And MUFON is the most respected UFO reporting agency so I had to share my experience with you.