We saw a disc-shaped object with a row of blinking lights traverse the sky silently, rapidly, and repeatedly.

My friend and I were walking towards a carnival in the parking lot of Belmont Hills Shopping Center (located on the corner of Windy Hill Road (then Cherokee Street)and Atlanta Road in Smyrna, Georgia in the late Spring of 1974. I glanced up into the sky above the shopping center (the sky was dark, probably around 8 p.m.) and observed a disc-shaped object with a row of sequentially blinking circular lights traversing a large angle of the sky repeatedly. This back and forth path covered an angle of maybe 80 degrees or so and was at a low altitude; maybe 150 ft or so above the shopping center. Since the sky was dark the lack of reference points made a size estimation difficult, but it appeared maybe 6-8 feet in diameter. The object was totally silent and rapid in its motion. It was witnessed by a couple walking away from the carnival.
Date is approximate.  PD