Object appeared in the sky, started moving slowly and then suddenly very fast and disappeared in Prviluka, Croatia.On a small island, in the port there was around 7 of us. Me and friend were star gazing and the object suddenly appeared. It had blueish colour and i think it was pulsating. It was standing still for 2 seconds and at first it was moving slowly for 2 seconds and then suddenly very fast almost like a flash and dissapeard. It was the size of a oval table with radius around 1 meter.