Most uncreative picture ever! But it’s suitable after CiSRA’s Puzzle Week. This might be the first time our AoPS team managed all four puzzles in a group.
…sigh, now I must handle the guilt for squeezing out so much time from my normal schedule.
This is one of a bunch of MellowMelon’s Double Backs. Briefly, draw a closed loop through all square centers visiting each bold-outlined area twice. Shaded cells do not influence solving, only aesthetics.