Move cube forward

So, my cube currently has animations for my cube in each direction (forward, back, left, right) in Unity4.

They currently don't move though, so what I want to happen is the player should move forward 1 unit every time the animation is played. How do I do this? My current C# script can be seen below

(Can the movement be done in animation?)

using UnityEngine; using System.Collections;

 public class PlayerMovement : MonoBehaviour {
 
 //Uses animations based on input and if no key is pushed then you stay idle
 void Update() {
     
     if(Input.GetKey("w"))
        {
          animation.Play("CubeMovementForward");
     }
     else if(Input.GetKey("a"))
     {
         animation.Play("CubeMovementLeft");
     }
     else if(Input.GetKey("s"))
     {
         animation.Play("CubeMovementBackward");
     }
      else if(Input.GetKey("d"))
     {
         animation.Play("CubeMovementRight");
     }
     else if(Input.GetButtonDown("Jump"))
     {
         animation.Play("CubeMovementJump");
     }
 }

}