I was walking out of my Irvine CA apartment, which is on the third floor, on my way to meet a friend for dinner around 8:15 pm. I immediately noticed 3 diamond shaped light configurations in the northwest corner of the sky towards Newport Beach, CA. I of course stopped and just stared. They were moving very fluidly, counter clockwise and then clock wise, back forth with no apparent set pattern- like kites would do. The lights were a very bright light blue. They would go completely off and them come back on. I couldn't make out exactly what type of craft they were on. I watched for about a minute and then two of them disappeared and just one remained. I saw it go behind a cloud and then reappear...so they had to be at least at cloud level. They were quite high in the sky because I was seeing them way over trees and building tops. I knew immediately that what I was seeing just by the shear movement of them was not an airplane, helicopter or military craft. I was already running quite late so I got in the car and headed to meet my friend, while I was driving I tried to hang my head out the window to see the remaining object. I wound up right under it when I got to the intersection and could make out a faint outline of some sort of a craft that looked grayish. I was a little worried at that point, realizing I was right under it. Then the traffic light turned and it was above my car so I could no longer see it. I called two friends and tried to get them to go outside and se if they could see it as well, but didn't reach them in time. Southern California is a big place with a huge population and I'm quite sure lots of other people had to see this as well. The whole experience left me in awe and made me feel quite small….there’s a big “world” out there obviously and I doubt we here on earth are much more than a speck.