Cut two lengths of yarn or rope so they are 3 feet each. Fold them in half together and make a loop.
Hold the top part of the loop and fold it over the length of the cord to create a hole. Circle the top of the loop under the hole and then bring it through.
Tie it off into a knot but leave some of the loop loose at the top.
Press the knot down securely using a paperweight or a clipboard. Take the right-hand strand and loop it around the left hand strand. This will create a loop. Pull the strand through the loop and down.
Repeat the same thing with the left-hand strand around the right this time. Pull it down and you will have created a hitch.
Continue this back and forth until you are finished with the cord. Tie it off with a knot at the end when finished.