How can ı activate my gameobject after wait little bit ?

I created a panel for my game over scene. I want to activate after one player reaches 3 in scoreboard. Problem is my panel is not showing. What is wrong about this script ? Thanks for help.

Code (CSharp):

1. public float speed;
2.     public Text countText;
3.     public Text winText;
4. public GameObject panel;
5.  
6.     private float t;
7.  
8.     // Create private references to the rigidbody component on the player, and the count of pick up objects picked up so far
9.     private Rigidbody rb;
10.     private int count;
11.  
12.     // At the start of the game..
13.     void Start()
14.     {
15.       // Make the game run as fast as possible
16.  
17.         // Assign the Rigidbody component to our private rb variable
18.         rb = GetComponent<Rigidbody>();
19.  
20.         // Set the count to zero
21.         count = 0;
22.  
23.         // Run the SetCountText function to update the UI (see below)
24.         SetCountText();
25.  
26.         // Set the text property of our Win Text UI to an empty string, making the 'You Win' (game over message) blank
27.         winText.text = "";
28.     }
29.  
30.     // Each physics step..
31.     void FixedUpdate()
32.     {
33.         // Set some local float variables equal to the value of our Horizontal and Vertical Inputs
34.         float moveHorizontal = Input.GetAxis("Horizontal");
35.         float moveVertical = Input.GetAxis("Vertical");
36.  
37.  
38.         // Create a Vector3 variable, and assign X and Z to feature our horizontal and vertical float variables above
39.         Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);
40.  
41.         // Add a physical force to our Player rigidbody using our 'movement' Vector3 above,
42.         // multiplying it by 'speed' - our public player speed that appears in the inspector
43.         rb.AddForce(movement * speed);
44.     }
45.  
46.     // When this game object intersects a collider with 'is trigger' checked,
47.     // store a reference to that collider in a variable named 'other'..
48.     void OnTriggerEnter(Collider other)
49.     {
50.         // ..and if the game object we intersect has the tag 'Pick Up' assigned to it..
51.         if (other.gameObject.CompareTag("Pick Up"))
52.         {
53.  
54.             // Make the other game object (the pick up) inactive, to make it disappear
55.             other.gameObject.SetActive(true);
56.  
57.             // Add one to the score variable 'count'
58.             count = count + 1;
59.  
60.             // Run the 'SetCountText()' function (see below)
61.             SetCountText();
62.         }
63.     }
64.  
65.     // Create a standalone function that can update the 'countText' UI and check if the required amount to win has been achieved
66.     void SetCountText()
67.     {
68.         // Update the text field of our 'countText' variable
69.         countText.text = ": " + count.ToString();
70.  
71.         // Check if our 'count' is equal to or exceeded 12
72.         if (count >= 3)
73.         {
74.             {
75.                 // Set the text value of our 'winText'
76.                 winText.text ="WİNNER!";
77.  
78.                 {
79.                     StartCoroutine(WaitForIt(2.1F));
80.                 }
81.                 IEnumerator WaitForIt(float waitTime)
82.                 {
83.                     yield return new WaitForSeconds(waitTime);
84.  
85.         gameObject.SetActive(true);
86.                 }
87.  
88.                 {
89.  
90.                 }

 

Okey ı solved. I just added panel. "panel.gameObject.SetActive(true);"