Loading prefabs in an array

I have a spawning script that spawns a random prefab from an array of prefabs. Element 7 (Floater, Figure1) will load if it is selected at the beginning of the game(Figure2), but when it should be randomly selected later on, the area in game where it should spawn is instead a long stretch of empty space (Figure3). The only difference between the Floater prefab and the triangle prefabs is that the Floater is one object and the triangles are three objects, and that the Floater has movement left and right.

The problem is that the coding I used tells the z axis of the Vector3 to be 0, which puts it behind the player (which another script tells it to be destroyed). So how can I get the z axis to stay wherever it is spawned?

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Floater : MonoBehaviour
6. {
7.  
8.     private GameObject player;
9.  
10.     private Vector3 pos1 = new Vector3(-2, 0, 0);
11.     private Vector3 pos2 = new Vector3(2, 0, 0);
12.     public float speed = 1.0f;
13.  
14.     // Start is called before the first frame update
15.     void Start()
16.     {
17.         player = GameObject.FindGameObjectWithTag("Player");
18.     }
19.  
20.     // Update is called once per frame
21.     void Update()
22.     {
23.         if (gameObject.transform.position.z < player.transform.position.z - 15)
24.         {
25.             Destroy(gameObject);
26.         }
27.  
28.         transform.position = Vector3.Lerp(pos1, pos2, Mathf.PingPong(Time.time * speed, 1.0f));
29.  
30.     }

 

Try:

Code (CSharp):

1.     void Start()
2.     {
3.         player = GameObject.FindGameObjectWithTag("Player");
4.         pos1.z = transform.position.z;
5.         pos2.z = transform.position.z;
6.     }
7.  

 

This worked! Thank you so much!