Pass rope around the post/rail; cross free end under the standing part (portion of rope connected to the horse's halter). 2. Form a loop, going over and then behind the standing rope. 3. Make a second loop in free end, keeping it near first loop, and pass it over standing rope & through first loop. 4. Set or snug the knot by pulling on both standing rope & second loop. To untie, simply pull on the tail end of the rope.
Paracord Woggle Tutorial (Turk's Head Knot). His instructions are so easy that I, Tiffany, was able to make 2 woggles in under 10 minutes, having never done a turkshead knot before. Love his videos! (Weavers of Eternity Renaissance)
[Animated] Knots! "Better to know a knot and not need it, than need a knot and not know it" :) Hover over the knots at this link to see their uses. Click on the knot to see an animation of how to do it.