I was leaving Somererset,tx on Benton City Rd. heading towards Loop 1604. I noticed two very bright red lights one on the right and one on the left, low in the sky up ahead. At this point I had no idea what it was.. I knew it was not a plane or any helicopter. I continued up to the stop sign and stayed there for about 3 or 4 minutes. Just watching this light. It did not move at all. It was proably around 800 feet up and about 1500- 2000 feet away from me. I decided to head towards San Antonio. I took a Left onto Loop 1604 heading NOrth. I drove very slowly. I was heading more towards the object at this time so I could get a closer look. I started to see this was very well an aircraft of some type. As I was driving around to the left of it.. I noticed there were two other lights. They were both white lights on each side, not as bright. It looks like it was either a diamond shaped aircraft.. or a circular aircraft. Two red lights opposite each other and two white lights opposite each other. I pulled off the side of the road and got out of the car. I was much closer probably about 900 feet away, and it was still at the same height. I could make out a tubular frame / steel colored and outlines of a door/ or hatch? Not sure what the out line was.. but could see detail on the body of the aircraft from the illuminating lights on all ends... There where no other lights coming from the craft. It had NO sound coming from it at all. aT THIS TIME I KNEW THIS WAS SOME KIND OF UFO. I started walking towards the field in it's direction. That is when it moved slowly away for about 4 more seconds and then quickly took off at the same height in the direction of Loop 1604 SOUTH. The white lights then were off and only the red lights were still on. This thing was so fast I watched it take off in the horizon and it was completely gone from my sight in less then 10 seconds. As I said before.. There was no noise at all coming from this UFO and it stayed at the same altitude as it left. I am wondering if anyone else out there saw this???? I only wish that I had my camcorder with me.....