  From Rauzy graph Rauzy Scheme can be obtaining by uniting sequence of
vertices of ingoing and outgoing degree 1 by arches. This notion is a tool to
describe Rauzy graph behavior. For morphic superword we prove periodicity of
Rauzy schemes. This fact has consequence in discrete dynamic systems and logic.
This fact is also generalization of fact that quadratic irrationals have
periodic chain fractions.
