My wife and I were walking our dogs in a deserted area of Marana called Jackson Flats. The time was 7:20 pm, and it was dark. We were walking north on a dirt road and we both noticed some unusual lights at about the same time. There appeared to be two separate lines of lights, amber colored and moving slowly. The stadium lights of Marana High School were on and the amber lights appeared to be to the north and further away than the stadium lights, which were about 3 miles from us. The two separate sets of amber lights were in a line or gentle arc, and each of the two sets consisted of three or more lights. The lights were not especially bright. One set stayed horizontal, and the other set tilted about 45 degrees. The lights were circular, and went off and reappeared, though this may have had something to do with clouds. The lights were on for less than 30 seconds, then went off and stayed off.There were one or two other aircraft in the area, and their lights were distinctly different than the amber lights. There was no sound.