Set up Animator with specific seconds

Hi everybody, im trying to set up some animation in Animator with specific seconds, for example: private Animator animator;

     void Start()
     {
         animator = GetComponent<Animator>();
     }
 
 
     public void startAnim()
     {
             if (firstAnim)
             {
                 // something like animator.setUp("Take 001") with seconds;
                 animator.Play("Take 001");
             }
     }

im trying to create animation, when i want to pause in half animation and play reverse. Anybody knows how to do it?