No problem. Glad I could clarify.
Knots have been a hobby now for just nearly 10 years. They are fascinating.
If you want to be blown away, go check out a big book called The Ashley Book of Knots. Clifford W. Ashley wrote it, complete with the most intricate hand-drawn diagrams, back in the early 20th century. (might've been around the '40s). Guy was amazing, if he knew all the stuff he put into that book. Good writer, too.
Also, find online the International Guild of Knot Tyers.
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Regarding the "Butterfly Stitch." This link takes you to the
Butterfly Stitch. It is the same site hosting the link I posted previously about the Cobra Stitch. Select Butterfly Stitch from the list at left.
If you attempt the stitch, note that it is generally easier to hold the base knot in the hand and do what is shown in the diagram
upside down. The diagram shows the knot such that it would get longer in a downward direction. It would be difficult to tie in this way.
Note that the Butterfly Stitch, when finished, is secured simply by tucking the last end through the last loop made. If this last end is unsecured, one can pull both ends and the entire knot will unzip, leaving you with useful cord (though kinked) that is 2 to three times as long as the lanyard you made. Use long-lasting paracord and you could use the keychain/lanyard as survival cord.
I usually start the Butterfly Stitch by bending a piece of cord into a bight, tying the ends into an overhand knot so that there is a loop about 3/4" long, hold the loop downward, and begin by making a bight with the left cord. The right cord is wrapped around the first bight (cross over in front, toward the left, and bring around behind), bent into a bight as well, and that bight is fed through the first bight, which is cinched down onto it. The rest is simple repetition. Have fun with it.
---Jeffrey