Help with GUI popup

I have a script attached to game objects on the scene, Is there any way to add a function that destroys the game objects if the player clicks Yes on the GUI popup and close the GUI popup if the player clicks No. Also how can i add the Yes and No button to the GUI popup. Help please.

My script:

using UnityEngine; using System.Collections;

public class OnClick : MonoBehaviour {

     // Use this for initialization
     private bool PopUp;
     public string Info;
     
     void OnMouseDown()
     {
         PopUp = true;
     }
     
     void DrawInfo()
     {
         Rect rect = new Rect (20,20, 300, 200);
         Rect close = new Rect (300,20,20,20);
         if (PopUp)
         {
             GUI.Box(rect, Info);
             if (GUI.Button(close,"X"))
             {
                 PopUp = false;
             }
         }
     }
     
     void OnGUI()
     {
         DrawInfo();
     }
 }