my co workers and I were outside our balcony on a break when we saw flying green lights in the sky

At one point I believe there were 6-7 total. They were extremely fast, almost going in circles, but not necessarily in order. I'm not a UFO person, so that's hard for me to explain. It started with one light that caught our attention, then about 3 became more constant. At some point there were about 6-7 surrounding the sky above us. We looked for anything that could explain it better than UFO's, but no indication of anything else. After a while most left. But 1 seemed very persistent.The one captured on video I believe. At some point, seemed liked 2 lights would come back and almost crash the persistent one, surround it, then would disappear, then only 2 lights kept going at it, until one left, and short after the other was also completely gone. I don't think I'm making much sense,
By the time I grabbed my phone, and started recording it, that's all the footage I got, before my phone died.