Practice with caution to avoid injury
Thrust the fingers to the opposite side of the body. Then, raise the same leg, pointing the knee in the same direction of the finger thrust. At the same time, drop the side of the fist down just in front of the raised thigh.
The basic blocking system is used to teach the beginner how to defend against various attacks. The blocking system is also used to develop the student's strength and functionality. Once the core understanding of the technique is achieved, it evolves with the practitioner's understanding, later encompassing striking, joint-locks, etc..