UFO Sighting in Croydon, Pennsylvania on 2017-08-05 23:03:00 - This object had purple lights and was hovering. i am not sure what it is. it hovered then moved away behind houses out where i couldn't film anymore. yes

I was outside around 11 30 pm letting my dog out. i suddenly see this object with purple lights and i started to film it. it hovered for a few minutes then started moving to the left and then went in the direction where it went behind a house and once i couldn't see it i ran and jumped up to see if i could see it and i saw it hovered away toward the opposite direction where i cold to see it anymore. i am not sure what it is. i hope someone can answer me.