The Programmable Code of Knot Tying

The essential language code behind knot tying consists of the bight, the loop and the elbow.  From these basic elements knots are formed.  How these elements are combined and how the shapes are captured define the resulting knot.

Here's an illustration of combining the code!  Form a loop and a bight separately.  Twist the loop into an elbow. These are the essential shapes.  Now starts the combining and capturing process. Fold the elbow (a stack of two loops).  Pull the bight through the center of that folded elbow.  The result is a scaffold knot for connecting to a carabiner.