This is a Friday maysu puzzle. Here are the rules for maysu:
Draw a loop consisting solely of line segments connecting the centers of grid cells, which cannot touch or cross itself, and may not go inside any cell more than once. It must pass through the center of every cell containing a circle. It must turn 90 degrees in cells with a black circle, and go at least two units in both directions from it. It must not turn in cells with a white circle, and must go less than two units in at least one of the two directions from it.