PSS.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PSS : MonoBehaviour
{
    public GameObject Pipes;
    public float spawnRate;
    public float timer = 0;
    public float heightOffset = 10;
    // Start is called before the first frame update
    void Start()
    {
        spawnPipe();
    }

    // Update is called once per frame
    void Update()
    {
        if (timer < spawnRate)
        {
            timer += Time.deltaTime;
        }
        else
        {
            spawnPipe();
            timer = 0;
        }
    }
    void spawnPipe()
    {
        float lowestPoint = transform.position.y - heightOffset;
        float highestPoint = transform.position.y + heightOffset;
        Instantiate(Pipes, new Vector3(transform.position.x, Random.Range(lowestPoint, highestPoint), 0), transform.rotation);
    }
}