Lights flashing above tent

We were camping in the woods near Hiouchi when we were awoken by wind. Pinecones wee loudly hitting the roof. Suddenly, a crash and tons of pinecones and branches fell from the tree above our tent. Light suddenly flashed in the sky, approximately 4 separate lights. Then, seconds later, the same pattern of lights, but they were anlged differently and above and to the side of the tent. It seemed to emanate from very close to our tent - no higher than the tree line. Moved silently.
A few weeks before, we had heard a constant beeping going up and down the creek in the middle of the night around the same time. The beeping lasted around 10 minutes, going back and forth, noiselessly covering a lot of ground.