Few years ago while travelling to Bosnia, my cousin and I looked at the sky. We were in a very small village where almost no lights disrupted the visibility of the stars. While looking we noticed that there were two stars which were a bit brighter, almost like the north star, except that the north star was not even close to them. What intrigued us even more was that those two stars were very close to each other, one above the other, in almost perfect 45 degree angle and they seemed to have the same brightness. I know usually stars can be very close to each other but different brightness due to different distances, but this wasn't the case. After a few seconds, one of the stars started woblling/vibrating, could have been from straining my eyes in order to focus on it, but than it started moving pretty fast in zig zag pattern and disappeared. After a few seconds the other star did the same thing. Another interesting thing was that the speed and what looked like perfect zig zag movement was in no way possible for any sattelite or airplane, especially since it didn't flicker in slight redish colors but perfectly white light. My cousin and I were happy but also confused that night of what we saw. But it got morbid a few days ago when i talked to my cousin and mentioned of that night, he just couldn't remember it. He is a forgetful person so I'm not paranoid :) but than the sighting of that night boggled my mind and I had to find an explanation for it. What could cause two stars, which are extremely close to each other, with same brightness to move zig zag and disappear?