While sitting outside on a clear and windless evening, approx. between 6 and 7 pm., my wife and i noticed to white lights approaching our location from a ridge nw of us about a quarter of a mile away. the two lighted orbs appeared at first to perhaps be helicopter lights as they were coming towards us rather slowly and in a straight line. it was a very quiet that evening, no traffic, and only a dog barking off in the distance. as they approached we both noticed that there was no other shape to them and absolutely no sound at all. none. we watched as they floated by us very slowly at that point. i decided to go inside and get my camera to get a few shots of them. my wife also went inside at that point. after going in, not being able to locate the camera, i went to the upstairs deck and observed them still floating in the same direction. they were about 500 yds past my house when all of a sudden, in tandem, they started to change color, red, blue, orange, green, white. i believe they rotated thru these twice and then, as if a switch had been shut off, they were gone.