Green orb descends from air then changes color, shape, and size and flashes lights on cows.I was driving down a dirt road in the country when I saw a medium green light suddenly appear approx 20 feet off the ground. The light was an orb about 1 ft by 1 ft. the orb descended at a rapid pace and then disappeared. A few seconds later I saw a flash of green light (lighter in color than the first light from the orb). Directly after the flash, I noticed a white/gray light flashing and changing positions on some cows where it had landed. The white/gray light had a solid beam from the source of it and when I could see it on the body of the cows it was making a line pattern. At this time I was approx 50 yards away from the object and I could see that the flashing light was on top or a part of a square object that was floating 2 to 3 ft off the ground. The object itself was probably 4 ft in length and 2 ft in width. It appeared to be made of metal and was a smoky gray color. The light coming from the object was certainly artificial but there was something v! ery unsettling about them. My entire observation lasted approx 5 minutes. When I saw it was floating, I turned the vehicle around and drove in the other direction down the same road I came from and drove for 2 miles. I was very shaken because I had no logical explanation for what I had seen. I am a truck driver that works in the oilfield so I had no choice but to return and resume my work about 20 minutes later. I got back to the location of the sighting around 8:15 pm and it and the cows (approx 10) were gone. I finished my work and left without seeing it again. It is also worth noting that while I was observing it and fleeing from it, that it didn't seem to notice me or the semi truck I was driving. While I was fleeing, I had a feeling of dread that if the object noticed me that it would not be good. This sighting is the most exciting and scariest event of my life. I don't have pics/video of the object because I fled when I got a good look at it. I returned to the location regularly and will try to get at least a picture of it, so long as I have the courage to do so.