A black triangular craft with 4 lights green and blue moved slowly through the sky.We were driving past Cahokia Mounds and got on an old road towards route 111. We saw a light and just figured it to be an airplane. As we came closer we could tell it was no airplane. It had 4 lights, blue and green colors. It was a black color but not a dark black, it was almost grey. It was very low, maybe 1000 feet off the ground. It was triangular, perfect no curves at all. Moved very slow and the lights on the craft made it obvious that it was in fact no airplane. It made no sound what so ever. The weather was dry, it was barely sprinkling and we had clear sight of it. The lights from the craft were just so bright it lit up the area around the craft.