Rotate a character with joystick

I have a left and a right joystick. The right joystick moves my character (up, down, left, right, ect.) What I want is then my left joystick to control the players rotation, independent of the players velocity or direction. That way I can have my character walk down and still shoot in any direction. Anyone got some ideas to help point me in the right direction for the left joystick? Thanks in advance.

To get Joystick:

Import the unity package called Standard Assets.

To get the value of the speller of the Joystick

What I know people use Input.GetAxis, try to see this links: