Destroy Prefab with UI Slider

HI Guys,

I managed to create a simple tower in Unity. It is really basic. Each time the user click or touch the screen a new prefab is instantiated.
I am trying to go forward with it and add ability to use sliders.

Say slider one will control height / number of floors being created. But don’t know how to use a slider to destroy GameObjects.

  1. Basically you drag slider to the right and it creates prefabs, drag to the left and it destroys it.
  2. Also how to control scale/translation/rotation of already instantiated prefabs in run time. I want be able to twist tower in run time with the slider.

I have attach two scripts I am currently using and link to a video.

Thank you

public class Instantiate : MonoBehaviour
    public GameObject floorPlate;
    public float floorHeight = 1f;
    public float towerTwist = 1f;
    public float slabHeight = 0.03f;
    public float slabSize = 3f;
    public float scale = 1f;

    private float offset = 0f;
    private float rotation = 0f;

    // Start is called before the first frame update
    void Start()

    // Update is called once per frame
    void Update()
            GameObject floor;
            floor = Instantiate(floorPlate, new Vector3(0f, offset, 0f), Quaternion.Euler(0f,rotation, 0f));
            floorPlate.transform.localScale = new Vector3(slabSize, slabHeight, slabSize);

            offset = floorHeight + offset;
            rotation = rotation + towerTwist;
            slabSize = slabSize / scale; 

Here is a screenshot as well …