i was in one beach near piraeus named kastela about 2300 i was making a bath with friends when an hour before we go i looked up and i saw something like star but much brighter like venus and i thnk that was venus but after a short while this thing star to make weird moves back and front and then after 2-3 minutes he started to make cicles and triangles moves that was the first daythe second day i saw it from my home again 8 km west of the beach he was making the same moves a bit slower the third day that i saw it just before the dawn 2 more starlike things appeard and passes the sky too fast and finally yesterday i was in the beach again and this time without lights and i saw something(4 of my friends saw it too the other was drunk)those star likes was 6 of them in the sky and when the one stops the moves the other starts to making a zigzag in the sky too fast and then it stop..today i can only see venus in the sky but im pretty sure that i will see them again whatever thoese things are..i take a photo of the first but its too blurry but you can see the difference in the color by the others start even with venus reflect on earth