using UnityEngine;
using System.Collections;

public class SpawnPrefab : MonoBehaviour {

  public GameObject prefabs;

    public Transform borderUp;
    public Transform borderD;
    public Transform borderL;
    public Transform borderR;

    void Start () {
  InvokeRepeating("Spawn", 2, 3);
    }

    void Spawn() {
  int x = (int)Random.Range(borderL.position.x,
                            borderR.position.x);

  int y = (int)Random.Range(borderD.position.y,
                            borderUp.position.y);

  Instantiate(prefabs, new Vector2(x, y), Quaternion.identity);
           
           
    }
}