Just need some paracord or any type of rope.
Make the paracord into the shape of a "S"
Pinch the middle
Grab the top strand and wrap it amongst itself.
Wrap until it can't be wrapped anymore
Fold the end, inside the loop
Pull on the bottom loop till u figure out which one tightens the top loop, like so in the pictures above.
Tighten it down
Then you have a finished noose.