Two star-like objects moving in erratic formations.

I was out late one night at Bible camp with my cabin.  We were at the beach around the campfire.  
I looked up at the stars and saw two moving objects.  They looked exactly like the rest of the stars, except that they were moving in erratic formations.  They were moving slowly, and seemed to stop or turn on a whim.  They did not make any noise.  
While doing their formation, they glided down to the left, where a tree was blocking my vision.  I did not catch sight of them afterwards.
We have changed the date, to reflect a nighttime sighting.  PD