Triangular craft flies very low over Dudley UK

I watched as a very bright light came slowly across our housing estate, as it came closer it looked triangular in shape with a row of very strong lights across the front(like flood lights on a football ground). As it fly over my car it went much slower and you could see cells that were randomly changing colour,they were sometimes red changing to yellow or blue, as it came over the car the cells all went yellow. It then turned onto its side and went faster and higher until it disapeared out of our view.