How to do it
Gently fold paper in half along both diagonals to make soft lines. Fold the left and right corners into the center.
Fold the left and right outer edges into the center.
Fold the top corner down.
Turn paper over. Fold down the top edge so the point is 1/2 inch below fold, making a flap.
Fold the flap up at the point.
Turn paper over. Fold the edges into the center from the outer bottom points to make a tie shape; pop out the corners at the top to make a knot shape. Write and fold the note, slip under flaps, and secure with tape.