Sliders/SETTINGS MENU in Unity

Mega145

Hi i was wathching SETTINGS MENU in Unity

and i was interested in making a sliders to change values (Player side) and i cant find correct things

my code:

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class value_test : MonoBehaviour

{

    public void SetSens (float sensitivity)

    (

        Debug.Log (sensitivity);

    )

}

Brackeys's

Brackeys code

Mine

Can Sameone please help me