At 12;25 a.m. aug 15 coming home from work i turned from us 130 onto us 150 heading east leaving Urbana,Ill and as i came over a very small ridge i saw a bright white lights directly over the highway about 4 miles away.I thought it strange to see something that bright and low.Well i thought it was just a small plane following the highway and expected it to turn and go on its way but it just stayed over the the road.I traveled 1 mile and was going to make my turn to go home but the lights was still there and seemed to be not moving so i stayed on highway and thought i would go to next cross roads in Mayview,Illinois just to satify my curiosity and would only be a mile out of my way and see why this light wasnt moving. Well i got to my second cross roads and the lights were still there but had moved south a little off highway and i thought to myself this is really strange so instead of turning off i continued down the highway slowly and i noticed the lights had moved south as i came upon a elevator called Fulls Siding just a mile east of Mayview just 200 yards to the south of the highway.I was looking out my front windshield and saw 2 white lights on the ends and in between i saw violet lights red lihgts blue lights and green lights. Some were blinking rapidly some slowly and some stay constant.The lifhts were about 50 to 70 feet long and about 150 to 200 feet in the air and about 200 to 300 yards away.Now this where i started acting strange.As i was watching it i thought i will stop and get out of my truck and get a detailed look at this because i noticed no other cars coming so i could stop right there and get out but something in my head said NO YOU DONT WANT TO GET OUT OF THE TRUCK. So i said to myself Im gonna pretend i dont see this thing and im gonna go to the next road and turn around get my phone camera out and take a picture of this thing but when i turned around it was gone and also this whole time there was no noise.When i came back to where i saw it i started scanning the sky and saw the same lights had moved back to the southwest and they were gone.Next day i got on google map and located the area where i saw it and saw a private grass landing strip and thought to myself okay someone had something up so i called the person who owns it and told him what i saw and he said he flys small single engine plane but had landed before sundown and he said he and no one else would have anything that big in there or be flying after sundown. Also on saturday september 8 i saw the same lights from my house at around 9;30 p.m. They were about 3/4 of a mile east of my house which would be 2.5 miles north of where the previous encounter happened. This light was about 100 to 150 feet in the air moving very slowly south. I yelled at my wife that i am looking at the same object i saw 3 weeks before and told her im getting in the truck with camcorder and binoculars and get a video but when i came out the house i could see this light fly away at high speed souhteast and was over Saint Joepsh ,Ill in a matter of seconds.