I was laying on my back at the beach , on a bright sunny , blue sky day with my girlfriend. i was just staring up into the cloudless sky. from an altitude higher than any airplane i have ever seen , 2 red objects , which appeared to have wings came into my sight. they circled each other , kinda chased each other like they were playing. i pointed it out to my wife , she was confused by what we were watching. for approx 1 min they flew erratically in a small area very high in the sky. then as quickly as they entered sight , it appeared they flew up / away so high they disappeared into the atmosphere. i have excellent vision ... it was not an airliner i saw blue skies , i saw them appear from the atmosphere it seemed , then they disappeared back beyond sight ... in a perfectly blue sky they were just tiny due to altitude , unnoticeable unless you were staring up at the sky at the moment, at that time they maneuvered like nothing i have ever seen no lights , no sounds i was simply confused to what i was watching