Was driving west toward Kansas City from Louisville with my fiancee, around dusk nearing St. Louis. We saw a few moving lights and unordinary shapes near the setting sun that appeared to be very far away. They were all hard to see and hard to differentiate from other more stationary objects, as it got darker we tried to keep an eye on them and they would move and disappear and re appear in a different location. We stopped for gas outside of the city and continued watching the objects, at dusk the lights started becoming more defined and irregular. They would become very bright and then completely dark. At one point the light stopped and I was able to make out a dark object against the sunset. Then multiple lights came back on blinking in very irregular ways and moving around each other at what appeared to be very fast speeds. As it became dark and we entered the city they disappeared