A bright orange light split into four, did a strange but precise set of movements, then joined back together and faded.

I was at a farm festival event standing on a small hill for children to climb.  I looked over to the south i think and I saw a bright orange light in the sky.  I thought it was just a firework so i watched it.  It soon broke into 4 individual hovering lights. They were lined up in a vertical position and they did not move for a second.  
Then, one by one, they started to move horizontally back and fourth, fading in and out.   They seemed to stay at the same altitude through this phenomenon.  
I kept watching and they soon stopped moving back and fourth and they rejoined the vertical line.  They then went back into one and the bright orange light dimmed until I couldn't see it anymore.  
I wasn't the only one that saw it and since the lights stayed at the same altitude for almost the entire duration of this event, I don't believe it could be a hoax of any kind.