My Camera will not move with script.

Everything else within the start and update functions works fine, but the camera will not move.

  void Start () {
     levelManager = FindObjectOfType<LevelManager>();
     enemySpawner = FindObjectOfType<EnemySpawner>();
     combatSpawner = FindObjectOfType<CombatSpawner>();
     takenPositions = combatSpawner.LoadPlayerPosition();
     mainCamera = FindObjectOfType<Camera> (); 

 }
 
 // Update is called once per frame
 void Update () {
     if (myTurn) {
         while(!checkValid || chosenPositions.Contains(new Vector2(xPos, yPos))) {
             xPos = Mathf.RoundToInt(Random.Range(1f, 37f));
             yPos = Mathf.RoundToInt(Random.Range(-10f, 18f));
             checkValid = CheckValid(new Vector2(xPos, yPos));
         }
         chosenPositions.Add(new Vector2(xPos, yPos));
         Vector2 position = new Vector2(xPos, yPos);
         if(takenPositions.Contains(new Vector2(xPos, yPos))) {
             mainCamera.transform.position = new Vector3(xPos, yPos, 0f);
             var goodHit = Instantiate(hit, position, Quaternion.identity);
             goodHit.name = "Hit_" + hitNumber;
             hitNumber++;
             if(hitNumber == 15) {
                 levelManager.LoadLevel("Lose");
             }
         } else {
             mainCamera.transform.position = new Vector3(xPos, yPos, 0f);
             var goodMiss = Instantiate(miss, position, Quaternion.identity);
             goodMiss.name = "Miss_" + missNumber;
             missNumber++;
         }
         myTurn = false;
     }
 }