Near the tail-end of the Borderlands 3: Guns, Love, and Tentacles DLC you'll come across a mission called "Horror in the Woods," that puts you face to face with a [spoiler] enemy. Before you can actually reach that fight though, you'll have to tackle a puzzle.
The solve is simple, but this will save you a bit of time. Continue reading for the solution!
Puzzle (non-story) spoilers: