Take the bottom right and left corners and make an accordion fold strips all the way up to the top right and left corners. If you press these with an iron the pleats will be nice and sharp. Leave unironed for a wavy casual look. You will now have a thin band the width of your accordion fold.
Slip a serviette ring onto one end of the accordion strip and pull gently to the middle. then fan out the accordion pleats on each side to make a pleasing balance to the serviette. Present on a plate.