Indescribable Recurring Dream Since I Was 4

They started happening back when I was 4, every few years I would get the exact same dream of sorts, it can’t describe it which is why I am here, all I can make of it is that it was almost static, you would almost see a spaceship like Galaga but you don’t notice it at all until I wake up and reflect on it. I remember moving lines, but I can’t describe the colour or shade. Every time I get this dream I wake up and don’t quite remember it or be able to describe it, but once every couple of years I would get a brief flashback to what the dream was like and forget it again. Anyone know what this is?

I am 17

What do you mean by static - as in not moving, or as in the fizzy stuff you see on a TV screen on a non-functioning channel (oops - I guess TVs don't do that anymore, do they?)

Was it frightening? If so it sounds like what's called a Night Terror, where people apparently just see shapes that might be shifting slightly but basically remain the same, accompanied by terror.

If not, then it sounds like it could be an NREM dream. REM means rapid eye movements, and that's what happens when we're having the normal kind of dream, like a little movie in your head. While dreaming like this your eyes are actually moving rapidly from side to side under your eyelids. But there's another kind of dream we also experience every night several times that most people don't notice, which is called non-REM (or Nrem). The eyes aren't moving for this kind of dream and it's different from normal dreams, in that usually all you see is a pattern or shape that doesn't move much if at all, and you have a stream of thoughts running through your head, in the form of words as you're thinking them, like an internal dialogue. Or monologue really. This is actually quite normal, as I said it happens several times each night but normally people just don't notice it. Sometimes you may be a little extra aware and happen to notice it.