New pause

public class pauseMenu : MonoBehaviour
{
	public GUISkin myskin;

	private Rect windowRect;
	private bool paused = false , waited = true;

	private void Start()
	{
		windowRect = new Rect(Screen.width /2 - 100, Screen.height /2 - 100, 200, 200);
	}

	private void waiting()
	{
		waited = true;
	}

	private void update()
	{
		if (waited)
		if (Input.GetKey(KeyCode.Escape) || Input.GetKey(KeyCode.P))
		{
			if (paused)
				paused = false;
			else
				paused = true;

			waited = false;
			Invoke("waiting",0.3f);
	    }

	 if (paused)
		 Time.timeScale = 0;
	 else
		 Time.timeScale = 1;

    }

	private void OnGUI()
	{
		if (paused)
			windowRect = GUI.Window (0, windowRect, windowFunc, "Pause Menu");
	}

	private void windowFunc(int id)
	{
		if (GUILayout.Button("Resume"))
		{
			paused = false;
		}
		GUILayout.BeginHorizontal ();
		if (GUILayout.Button("Options"))
		{

		}
		if (GUILayout.Button("Quit"))
		{

		}
		GUILayout.EndHorizontal ();
	}
}