My buddy suggested we go outside to watch a lunar eclipse when approx at 5:20am we sighted 4 what we thought were stars

We thought we were looking at stars when we noticed that these stars were moving. Two of these four what we thought were stars were moving at the same speed horizontally from each other. Three of these lights were the same light color while what seemed to be the head of the four flying objects had a flashing Blue light and would change from blue to green. And those same two lights thatt were horizontally from each travelled from the western horizon to the eastern horizon at the same speed.