Full moon sized ball of Light behind clouds

I work grave yard shifts. I went outside to take a break. I noticed what I first assumed was one of those advertising spotlights off to the west of me. The light made a half circle, stopped for about 5 seconds, then returned back to it's starting point, where it stopped again for 5 seconds . It traced a half circle once again stopped for another 5 seconds then moved off in a southeast direction until it disappeared from sight. After about 20 seconds I looked over my right shoulder and saw that it was back behind my right shoulder. It was back behind me long enough for me to grab my phone and set the camera to video mode. It began moving northwest until it came back to the original spot where I first noticed it. During the time I was observing it, it made no sound. The object began to move back in a southeasterly direction again while I "filmed" it. It continued in that direction until it was no longer visible and did not return. Of course when I checked the video there was nothing recorded, so either I did not start the video correctly or my phone malfunctioned.