I saw something strange?

So I was in the bathroom washing up like everything is normal and, when i turned around to look at the door i noticed this "thing" I guess you would call it and, I didn't get a bad or good feeling just the feeling that it was there and, was "alive" it looked liked a square but, the the lines on the left and, right extended further then, the top line. It also had a white glow but, was solid...

I saw something strange?