Seeing symbols displayed like language
 

I have had a few times where I’ve woken up during the night and I look up at the ceiling and it’s covered it strange symbols in strings/lines like you would see if you were reading something but I can never figure out what the symbols/unknown language is, I have also seen it when I rest and after a few minutes with my eyes closed I’ll quite often get symbols fading in and I can watch as it looks like they are drawn at the center of my eyes focus.
These symbols I can’t draw so I can’t show anyone what they look like,

If anyone knows what I could be seeing please share as I’m very interested to find out

Hear is my guess , as we all go out of body during deep sleep but don't remember , your picking up some thing from the astral plane but your brain can't understand it.