Flashing orbs that made geometric patterns and flashed different colors.

My two nieces Leslie and Diana where walking around the school campus after buying boba beverages. We arrived the scene around 8 PM. I noticed the lights and told them to look. We where perplexed at the speed and colors the where maneuvering. Sometimes they would scatter or form a triangle of some sort. It seemed like they where In sync with each other like a symphony because they wouldn't collide. It was seen towards the direction of the full moon behind the clouds. It started to rain when we left the scene at 10 PM.