We will start with a simple loop. Take a long length of thread. Leaving one or two inches at the end, fold the thread. Now tie a knot to make a loop at the top as you see here.
Now we have a loop and two ends of the thread. Take the long end and pull it through the loop to make another loop on top of it.
Repeat the procedure until you reach the desired length.
Leave a few inches at the end. If you like, you can add one or two wooden beads in this free space. Now it is ready to wear on your hand.
Hope you got the simple idea to make a friendship wristband.