UFO Sighting in Decatur, Illinois on March 29th 2016 – 15-20 white/black/transparent objects in v-formation

Was leaving Doherty's pub after I ate lunch(was not drinking)and looked up to see what I first thought was a flock of geese in a v-formation. The 15-20 objects were traveling from south to north. They first appeared white and black yet somehow partly transparent with small wings. The v-formation suddenly broke up and the objects grouped together in a circular formation. I then called a parking enforcement lady(meter maid) over and pointed the objects out to her. Another man smoking behind an office building was observing them also. By this time the objects appeared as metallic or chrome orbs. They then started swirling like leaves in a whirlwind while moving to the west, away from us. The sky was clear and the sun seemed to reflect off of the objects in many different colors, one color at a time - very bright, almost star-like. The objects then appeared to turn the exact color of the blue sky or maybe became invisible. The meter maid and I looked at each other and were speechless. I felt as though the objects knew I was watching them and that they wanted to be seen by me.