Have you ever been lucid during dreamless sleep/in the phases between dreams, so that its theoretically possible to stay aware/lucid the whole night? I heard it is somehow possible to get into that state by meditating in a lucid dream or trying to dissolve/destroy the dream, or by staying lucid in the end of a dream. Have you ever experienced a state of awareness in dreamless sleep? What technique did you use to achieve that? Btw, sorry for my english, i tried my best 