What you're probably experiencing is Phosphene [1] or, more specifically, closed eye hallucinations / visualizations (CEV) [2]. Level 1-2 is very common. Level

What you're probably experiencing is Phosphene [1] or, more specifically, closed eye hallucinations / visualizations (CEV) [2]. Level 1-2 is very common. Level 3 is normal. Level 4 isn't rare but not likely for most people. I get level 1-3 most nights. Typically a kind of lava lamp fractal experience. On occasion I get a level 4. Level 4 for me is usually like a high speed slide show of random visual memory frames from throughout the day. Almost like a snapshot low frame rate summary but played back quickly. I hope you find these links useful and enlightening. [1] https://en.m.wikipedia.org/wiki/Phosphene https://en.m.wikipedia.org/wiki/Phosphene [2] https://en.m.wikipedia.org/wiki/Closed-eye_hallucination https://en.m.wikipedia.org/wiki/Closed-eye_hallucination