Bright Turquoise light moving in the sky then completely disapeared

We had just exited the car when arriving home at my parent’s house. My mother stated look up in the sky, my father and I looked up and we saw a bright turquoise colored light, it at first looked as if like a missile going up at an angle into the sky very slowly, but then appeared quickly to be horizontal. It appeared as if 2 sets of lights one on top of the other, the light/ object moved to the right and then quickly back to the left and then again to the right. The light faded on one side and then completely disappeared. The sky was partly cloudy and the movement appeared as if behind a cloud part of the time, but you could still see the bright light.