Prefab Instantiation Script for Unity3D. Has rounds and pauses between rounds.

SpawnPrefab.cs

using UnityEngine;
using System.Collections;

public class SpawnPrefab : MonoBehaviour {

	public Transform prefabSpawnee;
	public float interval = 1;
	public int instancesPerRound = 5;
	public float pauseBetweenRounds = 3f;

	private int shotInRound = 0;
	private bool isActive = true;

	void Start () {
		ActivateSpawner();	
	}


	void Spawn () {

		if(isActive) {
			Transform prefabInstance;
			prefabInstance = Instantiate(prefabSpawnee, transform.position, transform.rotation) as Transform;
			shotInRound++;
		}

	}


	void ActivateSpawner() {
	
		InvokeRepeating("Spawn", 0, interval);
	
	}


	void Update() {

		if(shotInRound == instancesPerRound) {
			CancelInvoke("Spawn");
			shotInRound = 0;
			Invoke ("ActivateSpawner", pauseBetweenRounds);
		}

	}

}