Background moving slower than player?

[tawny ingot]

Hey Im making simple game where you move as ship and mine asteroids.

I wanted to make my background move slower than player so its "depth" effect to it as you can see on the video if its just on player all the time it looks weird and if its not moving at all its also weird.

So basicly how to make background follow player, not rotate, but move slower than him so it builds some offset.

thats my code but its not working really:

I used this script from codemonkey video:
https://www.youtube.com/watch?v=wBol2xzxCOU

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

public class Space : MonoBehaviour
{
    [SerializeField] private Vector2 parallaxEffectMultiplier;

    private Transform cameraTransform;
    private Vector3 lastCameraPosition;

    private void Start() 
    {
        cameraTransform = Camera.main.transform;
        lastCameraPosition = cameraTransform.position;
    }

    private void LateUpdate() 
    {
        Vector3 deltaMovement = cameraTransform.position - lastCameraPosition;
        transform.position += new Vector3(deltaMovement.x * parallaxEffectMultiplier.x, deltaMovement.y * parallaxEffectMultiplier.y);
        lastCameraPosition = cameraTransform.position;
    }
}