Simply get somebody to hand you the laundry and play with. Hang your Tic-tac-toed Laundry-pegs Set on the rope.
Use the ropes as the rows in the tic-tac-toe grid and arrange the laundry symmetrically so to it also forms the columns.
When done hanging just play the game placing a peg on each laundry piece, keeping in mind the 3x3 grid of the game. The clothes-pegs are double sided so you, doesn't really need to pay attention which one pick.