Six Traveled west to east, bright to dim as they traveled overhead.

My neighbor called me outside and said something was strange in the night sky, I looked toward the west and a bright light (red at first) was traveling west to east.  As it traveled overhead it became less bright and almost dark.  When that one disappeared another came from the west exactly like the first.  The traveled west to east and dimmed as the went overhead.  There was no sound to them, and one actually seemed to go a bit to the left and back the the right, but just a small variation. My neighbor said there was a total of six and I witnessed two myself.