Indistinct object with rapidly changing lights of different colors sighted moving erratically in Phoenixville

At about 1:00 AM on Tuesday, Sept. 20, my two dogs woke me to be taken outside. While outside, I noticed a rapidly flashing object moving in a westerly direction to the South of my home. Might have been at 2,000 - 5,000 feet in altitude. The object constantly changed in color (white, yellow, red or orange) as it moved through the sky, which it didn't do in a typical, linear fashion. It seemed to move erratically on short diagonals, like a search pattern. I couldn't easily make out the shape of this object from my vantage, and the alternating lights also made it hard to see the object's shape. The light was distinctive enough to see it through the branches of a large tree. This sighting made me extremely uneasy, and once business was attended to, we immediately went inside.