MonoBehaviour.OnLevelWasLoaded(int)

설명

This function is called after a new level was loaded.

level is the index of the level that was loaded. Use the menu item File->Build Settings... to see what scene the index refers to. See Also: Application.LoadLevel.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void OnLevelWasLoaded(int level) {
        if (level == 13)
            print("Woohoo");
        
    }
}

OnLevelWasLoaded can be a co-routine, simply use the yield statement in the function.