My kids and I were swimming in our pool at night when my son spotted 2 orbs travelling at a high rate of speed coming from the SSE crossing the sky going NNE. One sphere was greenish and it pulsated while the other one was white. They were about at a 30-40 degree angle from the horizon looking East. They made no sound whatsoever. At first it appeared to be a normal plane as the orbs seemed to travel where normal plane lights are placed along the wings. However, as they were crossing over the horizon they appeared to take their own independent flight pattern, crisscrossing each other but remaining together. I used to live near an AFB in Florida so I'm used to seeing F16's fly near me, these orbs however traveled at least twice as fast and made no sound. I live in a very busy air space with lots of planes (both commercial and smaller private ones). There were commercial planes at the time but travelling much slower and it much higher altitude. These orbs were flying much lower, similar to what a turbo prop plane would fly in this area (there are 2 small airports nearby. I've seen many smaller planes fly at a similar altitude at night, however, these orbs were much larger than plane lights when compared at the same altitude.(basketball vs. softball)Both my oldest son and I observed the phenomenon which only lasted a few seconds.