Ver fast light, changing colors.At about 20:00 hrs on the 15th of October, location Moss, south east Norway, looking eastwards, observing a small, but very bright light moving north at about the speed of a plane. Light gained speed that would exceed that of a plane and turned red. Light suddenly stopped for a few seconds while pulsating white light and before moving again towards the south. Light changed colors from white to green to red to white. It then accelerated rapidly and shut out of sight, towards the south. Observed through binoculars it appeared to be a small cluster of 3 or 4 lights. At least one of them green and one of them red and one of them white. The lights didn't change color themselves, but switched on and off.