How do I get a float from another script to an instantiated object's script?

Unity Engine
,
1

I am making an endless runner game and I want to make the ground slightly increase in speed with time and I want the obstacles to move faster with the ground, I already made the ground move faster but I need to get the float from the ground script to the obstacle script because every time the obstacle respawns it’s velocity resets. i tried using GetComponent<MovingFloor>().groundVelocity; but it didn’t work.

ground script:

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
  
    public class MovingFloor : MonoBehaviour
    {
  
        public float groundVelocity = 4.8f;
  
        void Start()
        {
            StartCoroutine(speedIncrease());
        }
  
        void Update()
        {
            transform.position -= new Vector3(groundVelocity * Time.deltaTime, 0, 0);
            if(transform.position.x < 0) transform.position += new Vector3(7, 0, 0);
        }
  
        IEnumerator speedIncrease()
        {
            while(true)
            {
                yield return new WaitForSeconds(2.5f);
                groundVelocity = groundVelocity + 0.1f;
            }
        }
  
    }

obstacles script:

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
  
    public class MovingObjects : MonoBehaviour
    {
  
        public float speed;
        private Rigidbody2D rb;
        private Vector2 screenBounds;
  
  
        void Update()
        {
            speed = GetComponent<MovingFloor>().groundVelocity;
            rb = this.GetComponent<Rigidbody2D>();
            rb.velocity = new Vector2(-speed, 0);
            screenBounds = Camera.main.ScreenToWorldPoint(new Vector3(0.0f, Screen.height, Camera.main.transform.position.z));
            if(transform.position.x < screenBounds.x * 2)
            {
                Destroy(this.gameObject);
            }
        }
  
    }

unity error:
NullReferenceException: Object reference not set to an instance of an object
MovingObjects.Update () (at Assets/MovingObjects.cs:15)

hope that made sense

2

Is the MovingFloor script on the same GameObject as the MovingObjects? If it’s not, you’ll need a reference to that GameObject first, either linked in the inspector or found with one of the various “Find” methods: Unity - Scripting API: GameObject