using UnityEngine;
using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

    public Texture2D fadeOutTexture;
    public float fadeSpeed = 0.3f;
    private const int DRAW_DEPTH = -1000;
    private float alpha = 1.0f;
    private int fadeDir = -1;

     void OnGUI()
    {
         alpha += fadeDir * fadeSpeed * Time.deltaTime;
         alpha = Mathf.Clamp01(alpha);

         GUI.color = new Color()
         {
             a = alpha
         };

         GUI.depth = DRAW_DEPTH;

         GUI.DrawTexture(new Rect(0, 0, Screen.width, Screen.height), fadeOutTexture);

    }

    public void FadeIn()
     {
         fadeDir = -1;
     }

    public void FadeOut()
    {
        fadeDir = 1;
    }

}