How to tie a Figure of Eight
Take one end of a rope and make a crossing turn (lay the end of a rope over itself). Make sure you take the working end of the rope over the standing part (the longer part that you are not using...the other end of the rope).
Now take the working end behind the standing part.
Now bring the working end across the front of the knot and pass it through the crossing turn (the 'loop' at the top of the rope). Pull the two ends tight to finish the knot.