I came home about 8:45 p.m. and looked in the sky and saw two "aircraft" with blinking lights flying to my left and then right and crisscrossing paths. Then one object flashed a string of very bright light, almost like daylight and it went in sequence from left to right and kept pulsating. It looked like a blinking lights sort of like the way a lighted cigarette will look in a dark room when moved very fast and it looks like it leaves a trail. The objects went back and forth varying in elevation. I know that the objects weren't that hight because when the lights were flashing they lighted up the tops of the trees. I watched this for about 45 minutes with a friend and we couldn't figure out what it was. I was reminded of the blinking lights seen over Mexico City. They flew back and forth, much faster than the aircraft we saw during the incident, then they flew behind a tree and disappeared.