Traveling north on county road 400 east in madison county. just after crossing 1250 north we passed a house and observed off to the left lights flying across a bean field at a high rate of speed. the lights were somewhat shielded from our view by a row of trees along a ditch line on the southeast corner of the field. my initial thought was "why would they be crop dusting at night with lights on the plane" then i remembered it was a bean field and they are not usually dusted by plane. just before reaching a small bridge where the ditch crosses the road the lights were at the east edge of the field just before reaching the edge of the road. i noticed then that the light appeared to be a bright sphere but then it turned slightly to the road and i could see 5 or 6 spheres in a straight line equally spaced apart and they seemed to nearly stop at the edge of the road then the furthest one away turned back west and up at about a 45 degree angle and the rest followed as if tied together and then just vanished. my wife was with me and she saw the same thing only she described it as similar to a row of very bright street lights and she also said she thought it moved more like a fighter jet flying at very low altitude across the field before she realized it was a row of lighted orbs. this occurred on friday july, 13, 2018 at approximately 9:30 pm. the spheres were not more than 15-20 feet above the ground and were around 10-12 feet in diameter.