Pick out your bandanna and lay it out flat
Take the corners and fold to opposite end to form a triangle.
Take both ends, loop then through belt loops and pull tight, until it's difficult to pull it any more.
Pull the bottom corner up to the top.
Tie the first two ends once in front of the bottom end
Tie the bottom into the other two twice.
Fill with whatever you need it for.
PS. If pockets is too loose, unite it and pull the first two corners tighter.