LegosteroidSpawner.cs

using UnityEngine;
using System.Collections;

public class LegosteroidSpawner : MonoBehaviour {

    public GameObject asteroid;

    public GameObject spawnAsteroid1;
    public GameObject spawnAsteroid2;
    public GameObject spawnAsteroid3;
    public GameObject spawnAsteroid4;

    // Use this for initialization
    void Start ()
    {
        StartCoroutine(AsteroidSpawn());

    }


    IEnumerator AsteroidSpawn()
    {
        yield return new WaitForSeconds(5f);
        spawnAsteroid1 = (GameObject)Instantiate(asteroid, new Vector3(-20.02866f, 11.89162f, 10f), Quaternion.identity);
        iTween.MoveTo(spawnAsteroid1, new Vector3(31.74726f, -10.16816f, 10f), 10);
        yield return new WaitForSeconds(3f);
        spawnAsteroid1 = (GameObject)Instantiate(asteroid, new Vector3(-5.576063f, 14.47898f, 10f), Quaternion.identity);
        iTween.MoveTo(spawnAsteroid1, new Vector3(-18.1424f, -11.79514f, 10f), 10);
        yield return new WaitForSeconds(7f);
        spawnAsteroid1 = (GameObject)Instantiate(asteroid, new Vector3(-19.92406f, 5.991251f, 10f), Quaternion.identity);
        iTween.MoveTo(spawnAsteroid1, new Vector3(28.23111f, 10.77588f, 10f), 10);
        yield return new WaitForSeconds(5f);
        spawnAsteroid1 = (GameObject)Instantiate(asteroid, new Vector3(19.55236f, 14.41265f, 10f), Quaternion.identity);
        iTween.MoveTo(spawnAsteroid1, new Vector3(5.40216f, -5.104211f, 10f), 10);

    }

    // Update is called once per frame
    void Update () {
	
	}
}