2 shape-shifting objects that stayed together over manhattan.

It was a little before 8pm. There was an opener for a concert I was at with some family right on the East River in Lower Manhattan. My father noticed the objects, and at first I thought they were just balloons that someone has released because they were pretty high up. However, the more I looked I realized they were not behaving like balloons. They would light up on all sides and then not at all. They were moving in such a strange manner I cannot even describe. They maintained exact distance and speed heading east until they went into the clouds or got too far away. At one point one lit up all at the same time. It was three perfect circles in a perfect triangle formation. The other one never did this, but it did have the same shape at certain points.