How to display a list of of screens one after the next

I am working on this game and I created this script where in the Editor it prompts the user to enter how many Texture2D does he/ she wants to add. But for some reason when I play the application it only shows the last screen. I do not know if that is because it does not read the first screen or if it is going through all the screens WAY to fast.

Here is the code I have so far:

public class GameScreenTransition :

MonoBehaviour { #region Fields

      /// 

      /// If there is more than 1 screen, the developer can use this

field to determine the wait time (in seconds) /// before transitioning to the next screen /// public int TimeBetweenScreens; /// /// Toggles the Fade option on/ off /// public bool EnableFadeIn;

      /// 

      /// Toggles the Fade option on/ off

      /// 

      public bool EnableFadeOut;

      /// 

      /// The speed at which the user wants the screen to fade

      /// 

      public float FadeTime;

      /// 

      /// Transparency level

      /// 

      private float _alpha = 1;

      #endregion 

      #region Properties

      public List Screen;

      private bool EnableFadeInProperty

      {

          get { return EnableFadeIn; }

          set { EnableFadeIn = value; }

      }

      private bool EnableFadeOutProperty

      {

          get { return EnableFadeOut; }

          set { EnableFadeOut = value; }

      }

      #endregion 

      #region Unity Events

      /// 

      /// Handles all GUI draw calls onto the screen

      /// 

      void OnGUI()

      {

          DrawScreen();

      }

      #endregion 

      #region Private Fields

      private void DrawScreen()

      {   

          foreach(var texture in Screen)

          {

              if (EnableFadeInProperty)

                  FadeIn();

              GUI.DrawTexture(new Rect(0, 0, UnityEngine.Screen.width,

UnityEngine.Screen.height), texture);

              if (EnableFadeOutProperty)

                  FadeOut();

              StartCoroutine(Wait());

          }

      }

      private void FadeIn()

      {

          var d = 0.3f / FadeTime;

          while (_alpha < 1) { _alpha += Time.deltaTime * d; StartCoroutine(Wait()); }

      }

      private void FadeOut()

      {

          var d = 0.3f / FadeTime;

          while (_alpha > 0) { _alpha -= Time.deltaTime * d; StartCoroutine(Wait()); }

      }

      #endregion

      #region Coroutines

      IEnumerator Wait()

      {

          yield return new WaitForSeconds(TimeBetweenScreens);

      }

      #endregion 

  }

Can anyone tell me what I am doing wrong? I am sure the error is in my foreach loop. Many thanks in advance!