Рандомный спавн в Unity 2D

 using UnityEngine;

public class Spawner : MonoBehaviour
{
   [SerializeField] GameObject[] spawnObj;
[SerializeField] float spawnDelay;
[SerializeField] float xSize;
[SerializeField] float ySize;
float timer = 0;

void Update()
{
    if (timer > 0)
    {
        timer -= Time.deltaTime;
    }
    else
    {
        timer = spawnDelay;
        GameObject toSpawn = spawnObj[Random.Range(0, spawnObj.Length-1)];
        Vector2 pos = transform.position + Vector3(Random.Range(-xSize, xSize), Random.Range(-ySize, ySize), 0);
        Instantiate(toSpawn, pos, Quaternion.identity);
    }
}
}