Simple tutorial to give you a feel for the concept of shibori
Note on yarn:
You must use a yarn which will felt, pure wool or at least 80 % wool, not superwash.
If the label says that it can be machine-washed - it cannot be felted.
Note on pattern:
This is a tutorial. It offers different options for the scarf before felting, including machine knitting the scarf, hand knitting the scarf and using an old sweater.