Fold two Gavroches in the basic bias fold and tie them together at one end with a Classique Petite scarf ring in the basic slide:
Place the resulting long stripe on your neck, with the ends hanging down your front. Cross the ends and bring them back behind your neck. Secure the ends by sliding them back through the scarf ring.
The same principle to two 70 Carrés, only bringing the ends back to the front and then securing them with a double knot: