I was camping by myself at the Joshua tree national park and taking long exposure photos in the dark. No one was in the campground with me, and It was around 11:30pm when I saw a flashing circle light in the sky. It sounded like a really quiet passing over me. The sound constantly went off and on and then completely stopped. The long exposure photo of the UFO shows kind of a flare where it flew by and 2 glowing blue circle shapes from where it hovered. There was no background lights from my tent or anywhere around me.