Three white lights were hovering in the Terre Haute area.The date of occurrences are between April 19-24. I saw these objects while visiting my family in Terre Haute, IN.I’m a smoker and a night owl and had to go outside to smoke. As I watched the night sky, usually from 11pm to 3am, I would notice one object that frequented the northeastern sky. Another appeared on occasion southwest of it. A third appeared in between the two on only two nights. One night, I saw two flying across the sky as if together; however, one was at a higher altitude than the other. At the time, I wondered why two planes would have been allowed to fly so closely together. Turns out, they were not planes.The objects were very high in the sky and appeared to be bright stars. All three had a steady white light. I also saw the haphazard flashing of a green light, and sometimes a red one pulsating from each. The objects were so high in the sky that I couldn’t make out a definite shape; however, the pulsating colored lights may have been underneath the objects as if suspended from helicopter skids. It is possible that the objects were triangular but that is only speculation.The northeastern-most seemed to be the most active with its flight path. All three objects seemed to hover most of the time but sometimes would move ahead, execute a tight circle, then move forward again. They all stayed in their designated areas. Their actions were similar to a remote control toy being repeatedly moved then stopped. Sometimes, when executing a circle, a turn, a sideways maneuver or acceleration, bursts of firefly-looking exhaust emitted from them. .I believe that Terre Haute is in the flight path of some planes leaving Indianapolis International Airport. On more than one occasion, I was able to compare the planes’ pulsating lights and chemtrails of jets to the UFO’s. The jets were probably close to their highest altitude but were not nearly as high as the UFO’s.I also compared the objects to the stars. The objects were at a much lower altitude than the stars but much too high to be planes or helicopters.The only background was the night sky. The objects were only visible at night. They were not visible when overcast. They did not emit any sound.