5 sets of lights fly into the clouds and turn into or return to 5 large black soundless aircrafts

I observed two sets of lights in the sky in an area where commercial aircraft fly near my house to approach the Indianapolis airport for landings.  
The lights were flying side by side with some distance in between them.  They were traveling at a low speed and I thought they were possibly helicopters, however there was no engine noise.  
I noticed that there was more distance between the two sets of lights.  
At that point I noticed that one set of lights was climbing upward.  I watched the ascending set of lights climb through a cloud until it vanished from my view.  
Then I saw a very large black circular and triangular shaped aircraft emerge from behind the clouds floating very slowly. 
The craft started descending and changed into a baloon like shape.  
I saw a total of five sets of lights and all five flew the exact same pattern and did the same thing.  I did not see where they went or landed. 
I am a 66 year old Air Force Veteran and I have never seen anything like this.