On this particular clear sky evening in rural Iowa. I was leaving our farm and goin on a date in town. I was 17 at the time and was going to meet my girlfriend. On the way up the gravel road I happened to notice on my left a light in the sky...not unusual really ecept this one was doing some very odd things...Odd enough for me to slow the car down and take a closer look. Another vehicle coming towards me also slowed down and I could see the people in side looking in the same direction as I as they passed...I stopped and they continued on..as the dust settled from the road I got a much better look at this craft. From my vantage point it was simply a VERY bright light light in the southern sky...it was not all that far off the ground and I noticed it suddenly throw an incredibly bright beam straight down to the ground..I thought then it was just perhaps a police helicopter. What told me different was the incredible flashes of color it suddenly began to give off...first a brilliant green fading into green then blue then yellow...not airplane lights...these were bright and faded from one to another and the speed in which they changed varied ...as I watched this thing..it stopped the beam of light it had in the fields below...and then it swiftly moved to the right....then up and then back down forming a triangle type flight path of about perhaps a mile in length...it was no more than a quarter or a half mile from my viewpoint butI figure but who can tell?....I got out of the car and I couldnt hear any sound from the direction of the object at all. As soon as it made the triangle manuver, it suddenly took off at a speed no conventional craft could attain and went straight to the horizon and disapeered. I had a wonderful view to the horizon and I would say it crossed about 20 miles in less than 5 seconds...I sat in my car amazed and completly happy...I had my first encounter with something I believe wasn't of this earth...and buddy, they got the SPEED!!! Im glad I finally got to tell someone off! iial about it..thank you Mr Davenport