The text begins with the redefinition of the term "complex sequence" in relation to the term "complex counterpoint". There are two basic types of complex sequences - the sequence with a dual model and a cross-transposition sequence - while the third type represents their combination. Furthermore, the two shown examples from pedagogical practice illustrate the most common mistakes made in making two basic types. As a rule, the problem lies in the poor problem location. A precise methodology is presented in the central part of the text on a step-by-step basis, first with dual model sequences and then with code sequences with cross-transposition. The final section of the text summarizes all most important elements for making complex two-part sequences.