Need to press key 2 times to shoot

I have made a JavaScript for shooting, but i want to check if the animaton is playing before shooting so i made this:

 #pragma strict
 
 var arrowCasing : Rigidbody2D;
 var ejectSpeed : int = 15;
 var anim : Animator;
 
 function Start () {
 
 }
 
 function Update () {
 if(Input.GetKeyDown(KeyCode.Space)){
     
 var arrow : Rigidbody2D;
 anim.SetBool("Shooting", true);
 
  if(anim.GetCurrentAnimatorStateInfo(0).IsName("Shoot")){
 
 arrow = Instantiate(arrowCasing, transform.position, transform.rotation);
 arrow.velocity = transform.TransformDirection(Vector2.right * ejectSpeed);
 
 Wait(0.5);
 
 }
 }
 }
 
 function Wait(time : float)
  {
    yield new WaitForSeconds(time);
    anim.SetBool("Shooting", false);
  }

When i press space the animation is playing but i need press space a second time to shoot. How can I making the player shoot by pressing space once and be sure that the animation is playing ?