A light appearing in the sea, splitting into few lights and going in and out of the water, no sound

Late in the night a white light appears on the sea, I was not sure at start of it is a fishing boat or not. My view was from up the cliff into the bay.
It got my attention by moving in a 8 shape route between 2 small islands at the sea again and again.
Later it stopped in one place and started to split the light into a 3 triangle light shape and a 4 Square light shape. The light also went into the water and out with no sound what so ever.
Just before the sunrise the light moved behind the cliff to the other side of the bay, I was hoping when the sun will rise that I'll be able to see more clearly what the light is. Few minutes later the light come back to the bay and quickly moved into the horizon, until I couldn't see it anymore, still being "floating" on the water.
I took a video only of the part where the light split, but I had to cut it to just few minutes so I'll be able to upload it here in the website and I took a video in the morning of the same part of the sea to have perspective of the view.