Take the end of the yarn and put it in the crease between your thumb and pointer finger.
Weave the remainder of the string between the rest if your fingers.
Continue to weave the yarn through your fingers again, then again, until each finger has two loops.
Take the bottom loop and take it over your finger, leaving the top one.
Repeat with the other fingers.
It will end up looking like this.
Weave another 2 rows above the remainders on the bottom, and repeat the process of looping it over your fingers.
Keep on weaving and looping until your desired length. A scarf will take no more than 1/2 and hour, and even shorter if you focus hard.
This is what your final product will turn out to be like!