About an hour before dawn we were traveling northbound on us highway 65 and were a few miles north of humeston when one or two bright pulsating strobe like lights showed up ahead of us above the west highway right of way fence. it was about 150 feet in the air and about 300 feet ahead of us and it stayed that way as we traveled down the highway for about a minute. then it slowed down quickly until it was right above us on the drivers side of the truck and stayed with us for another minute before dropping back and crossing the highway about a quarter of a mile behind us. it followed for about another minute or two and at one point it quickly came up right behind us before backing completely off. it was about that time we finally met a truck and then lost sight of it. until then there was no other traffic on the road but us and also no farmhouses in this area. we at first thought it was maybe a light on top of a utility pole until we realized that we weren’t getting closer to it. it was unlike anything we’ve ever seen and the whole event left us a bit unnerved because it focused on us.