The '=' sign moves to the adjacent position in a CW direction in each step. The symbol at the ACW-end position in fig. (A), moves to the adjacent position in an ACW direction in each step and gets replaced by a new symbol in first, third, fifth, ... steps. The symbol at the CW-end position in fig. (A), moves to the adjacent position in an ACW direction in each step and gets replaced by a new symbol in second, fourth, sixth, ... steps.