Fold the bottom of the bag and match the ends. Cut along the crease
Fold the sides of the bag towards the center; it should look like a capital H. Crease the folds outward.
Now fold each panel again matching the folds. Then you will have a shape that resembles an accordion. Match the folds and punch holes in the top and bottom.
Mark the center of the bag, fold it in half over the ruler to create the crease. Pop out all the folds.
Run the string through the holes, draw it in a little but not too much. Tie off the string with a knot leaving the ends open. That’s it beautiful lantern is ready!