An orange circle and a blue square move around the outer cells of a $3\times 3$ grid. Which figure comes next in the series?

The circle moves 1 cell clockwise each step; the square moves 2 cells anticlockwise. From the last figure the circle goes to the bottom-right corner and the square goes from the middle-left cell two cells anticlockwise to the bottom-middle cell: (b). (a) moves the square only 1 cell, (c) moves it clockwise and (d) moves the circle backwards.