Three of us were camping and decided to go to the banks of restoule lake to stargaze. we were looking into the sky and noticed a white starlike object that was quite bright in the sky. we thought it was a plane or helicopter at first as it was flying towards us. eventually it got to a point over the lake and stopped coming towards us. it was over the water and pretty high up. we decided it couldn't have been a plane or helicopter as there was no sound. then we thought maybe a drone, but we wondered why it would be over water at that time at night and at such a height. the object then started to move up and down in a straight line fairly rapidly. eventually it stopped. we were pretty worried and one of my friend's said we should go back to the tent but we decided to stay and watch it. after the object had stopped moving up and down it slowly started to fly backwards, it didn't appear to turn around, it just flew backwards in the same direction it came from. it kept flying off into the distance (which was really quite far). we watched it until we could no longer see it. it just flew off into the horizon. i have butterflies in my stomach just writing this post, or even tell anyone else.