This refers to the situation at night, in the dark, with your eyes closed, but conscious and not sleeping. The colors and patterns you see are known as phosphenes:
https://en.wikipedia.org/wiki/Phosphene. Surprisingly, there are very few images/videos of phosphenes online.
Then, there is this article about closed-eye hallucination:
https://en.wikipedia.org/wiki/Closed-eye_hallucination which describes 5 levels of closed-eye visualization:
Level 1: Visual noise
Level 2: Light/dark flashes
Level 3: Patterns, motion, and color
Level 4: Objects and things
Level 5: Overriding physical perception
I think I am always at level 3. I guess what I see is what other people describe as "hallucination," but I wouldn't describe it as hallucination, because it's what I see, all the time. I either see concentric purple and green patches (not perfectly circular rings), or zebra-style stripes of purple and green color. In the first case, the patches move inwards, and in the second case, the stripes move, you could almost say they dance. The "dancing zebra stripes" case is somewhat similar to (F), but with a lot more green stripes. The video (H) kind of describes the mechanics of "dancing," but again, is not precisely what I see.
From the images and videos I've been able to found, I realize that everyone sees something different. None of the images/videos above matches precisely with my personal experience.
I checked with my daughter and surprisingly her case is very close to my case (at least the case of concentric patches in purple and green, though she described her green as yellow-green.) My son says he sees dancing zebra stripes, but in four colors: black, white, blue, and green. He was very clear that he saw blue color, not purple color.
What do you see? I am just wondering whether autistic people tend to see similar colors/patterns.
This is most interesting. Regularly I am at Level 3, then occasionally 4 and 5. I have discussed this with my therapist who diagnosed my OCD/Asperger's, as a visual manifestation of my non-typical brain wiring. I experience Visual Noise all the time with my eyes open or closed, just accepted it as what is normal for me.