Take a turn around the base of the cleat, and then bring the line over the top of the cleat. Wrap the line back under the arm of the cleat opposite the first turn, then back over the top of the cleat. Wrap under the first arm a 2nd time and then back over the top of the cleat. Then form an under hand loop and slip that loop over the arm of the cleat, which pins the free end under the last wrap. Finally, pull the free end tight.