Four red lights, not flashing, traveling in a line north to south

I witnessed four non flashing red lights, traveling in a line formation from north to south, not obscured by any clouds. The lights traveled at a constant rate of speed and as they approached my location suddenly disappeared. I took pictures, and the pictures reveal more lights than I visualized. One picture I took was a live capture, revealing erratic movement in multiple planes. There was no noise. I originally thought they were drones until they disappeared. The lights disappeared one by one as they reached the same location overhead. The final light was larger than the previous three lights. I am a physical therapist I was taking my dad home from Christmas Eve dinner. I am a non-drinker.