logic please

Design a circuit using D F such that If the input "x" equals "o" the counter follows the following order: 0-2-1-3-0-2-1-3-... If the input "x" equals "1" the counter follows the following order: 3-1-2-0-3-1-2-0-.... There should be two output, "y" & "z" such that: When the counter switches from "1" to "3" then the output "y" should equal to "1" zero otherwise. When the counter equals "2" the output "z" should equal to "1", zero otherwise