How to tie a Stevedore Knot
Give yourself plenty of rope for a long working end. Take it over the standing part (this forms a crossing turn).
Now pass the working end behind the standing part.
Now bring it back in front again.
Now take it behind the standing part one more time. Now you can bring the working end up to the front of the knot.
Put the working end of the knot through the crossing turn.
Pull tight by pulling on the standing part and the working end. You can tighten the knot even more by pulling the two turns.