Stage Two: Functional
The second stage is the study the functional application of the movements. You need to practice applying the techniques of the pattern against attacks by other students, as in one-step sparring. Patterns were not designed for fighting other Taekwondo artists in long-range, choreographed matches; they were designed for self-defense against real attackers. Real fights are not fought from long-range with each person taking turns attacking. Real fights are close-range, unpredictable, and quick, with no regard to proper stances or techniques. Practice pattern techniques against another student's attack so you see the purpose of the technique and learn to use it against the resistance of an attacker's body.