I was watching the moon on June 4 at 9:pm, a nearly full moon, and a partly cloudy night. Then I had a UFO Sighting of a pulsating/rotating light showing through a thin patch of clouds. The UFO Sighting remained in place for about 5-10 seconds, then stopped. I watched for a while to see if anything would exit the cloud patch, but saw nothing, though I did not have full view of the entire cloud. The lights were consistent with the pattern you'd expect from an object with a ring of lights around it's edge, rotating. It was fairly large, roughly the angular size of the moon, and just above the clouds. Using the angular size of the moon and approximate altitude of clouds of about 7000 ft. I estimate the UFO Sighting size to be between 60 - 200 ft. I have watched the sky for many years, having an interest in space and studying physics, and I have seen many strange, but explainable things; satellites, NASA rocket launches, all types of lightning. this was something I could not explain. The nearest thing even remotely similar would be lightning, however, there are some issues with that facts in favor of lightning a light seen in/behind a cloud facts against lightning there were no thunderstorms that night, and no other flashes of lightning were seen throughout the night. The pattern of light was not a flash, it did not light up the cloud, it did not have any bolts or streaking. It was a strobing rotating light, which was steady for about 5-10 seconds. There was no thunder lightning is not typical to this type of cloud, though the type of cloud Stratocumlus is only my best estimate. mufon cms# 109297 Sunderland Massachusetts U.S 6/4/20 Region has had 1,382 Reported UFO Sightings to date.