How to tie a friendship knot

The friendship knot is one of the eleven basic knots of traditional Chinese knotting.
Used to tie a lanyard/neckerchief together or as a decorative knot used in macabre.
Over the last couple of decades the knot has become popular among Scouts as an alternative to a woggle at Jamborees and camps.
You can either tie a friendship knot in your own neckerchief, or tie one in a friends.