Flashing red/ green light, circling in sky. NE PhillyI looked up at the sky like I do every night when I get off the train and yesterday I saw something Ive never seen before. There was a small light, not too high, up in the sky, changing colors from red to an aqua green/blue. It pulsed from color to color, having a solid red colors at times. It never really flashed white and we couldn't hear a sound. The path was a big circle, every once in awhile it was hover and head up higher in the sky but the entire time the colors would alternate and change. Possible sound came from but I cant say for sure with the location I was in and the passing planes in the sky. We had a friend keeping watch, and at one point a spotlight was on the object and soon after disappeared.