It was like 22hrs. I was checking my water cistern over the rooftop at home, so I was carrying a flashlight and I soon as I finished my job there, I was pointing my flashlight to the sky, like "playing" with the light beam. Then, I saw this object, right above of my head, like a 400 or 500 meters from the ground, a black triangle with dim red lights at the corners. It wasn't making any kind of sound or leaving fume trail either, just flying in straight line with a left turn to the east until it was impossible to distinguish it from the other stars in the horizon. I think it was flying over at high speed because it took maybe no more than 15 secs. from the first time I saw it above my head and when it faded at the distance.