Sword is Messed Up

I added a sword to my player and the animation is very simple. The part of the code says no errors but when I play the game the sword just flashes. (Using C-Sharp script)`if (anim.GetBool ("Sword")) anim.SetBool ("Sword", false);

     if (Input.GetKey (KeyCode.L)) 
     {
         anim.SetBool ("Sword", true);
     }`