how to have animator play sprite animation on button press. wait for completion.

. So my set up is i have various animations for character movements. i have a animator controller set up to play them depending on the value of a variable. i then have code where when a button is pressed, depending, variable mvar is changed.

. Im trying to get my character to jump now. So I tried to code it to where the when the space key is pressed, it changes the mvar value. Which tells the animator controller to play the jump animation. Then I wait a couple seconds and change the value back to 0 telling the controller to play the standing animation. I cant get thing to work. I dont know how I would get this to work. Please Point me in the right direction. Everything I see is for 3d animations and this is 2d... . The debug messages works. it waits. but the jump animation flashes for split second before returning to standing animation. Ive messed with wait times up to 8 seconds with no luck. I think I am not using appropriate code. How to write it to wait for the animations completion?

heres my code:

 public class FSpriteCntrl : MonoBehaviour {
     private Animator animator;
     int keyw;
     int keya;
     int keys;
     int keyd;
 
 
 
     void Start () {
 
         animator = this.GetComponent<Animator>();
     }
 
     void Update () {
 
         //sets values if any movemnt button is pressed
         if (Input.GetKeyDown ("w")) {
             keyw = 1;
             animator.SetInteger ("MVar",1);
         }
         if (Input.GetKeyDown ("a")) {
             keya = 1;
             animator.SetInteger ("MVar",2);
         }
         if (Input.GetKeyDown ("s")) {
             keys = 1;
             animator.SetInteger ("MVar",3);
         }
         if (Input.GetKeyDown ("d")) {
             keyd = 1;
             animator.SetInteger ("MVar",2);
         }
         if (Input.GetKeyDown (KeyCode.Space)) {
                 
             StartCoroutine(Jump());  //when space key is pressed runs the subroutine.
         }
 
         //when wasd are let go sets the key variable to 0
         if (Input.GetKeyUp ("w")) {
             keyw = 0;
         }
         if (Input.GetKeyUp ("a")) {
             keya = 0;
         }
         if (Input.GetKeyUp ("s")) {
             keys = 0;
         }
         if (Input.GetKeyUp ("d")) {
             keyd = 0;
         }
         
         //checks wasd if none are being held then sets variable to play stand animation
         if (keyw == 0 && keya == 0 && keys == 0 && keyd == 0){        
             animator.SetInteger ("MVar", 0);
         }
         
 
     }
 
     IEnumerator Jump() {
 
         animator.SetInteger ("MVar", 5); //sets mvar to 5 telling animator controller to play the sprites jump animation.
         Debug.Log("Before Waiting 1 seconds");
         yield return new WaitForSeconds(1); 
         animator.SetInteger ("MVar", 0);//changes value back to zero so the character returns to standing animation.
         Debug.Log("After Waiting 1 Seconds");
     }
 
     
 }