I need a knot that can be fastened and unfastened as quickly as possible (like a toggle on a jacket; twist and release). I also need to be able to tighten or loosen the rope easily. Basically, I want a rope that works how a seatbelt works.
I can only envision a loop at one end and a "stopper" at the other end, like one, might find in a bracelet. Here's an example of what I mean.
Then I would need to be able to tighten this loop.
My goal is to bring two horizontal poles close together by looping a rope around them.
This seems like such a simple concept and yet my searches have proved fruitless, likely because I don't even know where to begin with knot fundamentals (from my Scouts days I have retained nothing more than the reef knot!).