I know a special technique to walk in a mountain at night. While you can’t see very well, and you always don’t know where to put your next step. So the only thing you can see is, dark is soil, white is stone, light is a pond. “Dark soil; White stone; light pond“; that is my magic spell to help me walk in a mountain at night. Of course there are more stuff in the mountain that we should aware for safety, but the magic spell help me to keep go forward.