Scoring Points with UI Text

Hi,

I need to add points for my pong remake Click Here

But I forgot how to here is a photo of what the Text looks like

Here is the Balls Script

 using System;
 using System.IO;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 using UnityEngine.UI;
 
 public class Ball : MonoBehaviour
 {
     public float speed = 12;
     void Start()
     {
         // Initial Velocity
         GetComponent<Rigidbody2D>().velocity = Vector2.right * speed;
     }
     float hitFactor(Vector2 ballPos, Vector2 racketPos,
                     float racketHeight)
     {
         // ascii art:
         // ||  1 <- at the top of the racket
         // ||
         // ||  0 <- at the middle of the racket
         // ||
         // || -1 <- at the bottom of the racket
         return (ballPos.y - racketPos.y) / racketHeight;
     }
 
     void OnCollisionEnter2D(Collision2D col)
     {
         // Note: 'col' holds the collision information. If the
         // Ball collided with a racket, then:
         //   col.gameObject is the racket
         //   col.transform.position is the racket's position
         //   col.collider is the racket's collider
 
         // Hit the left Racket?
         if (col.gameObject.name == "RacketLeft")
         {
             // Calculate hit Factor
             float y = hitFactor(transform.position,
                                 col.transform.position,
                                 col.collider.bounds.size.y);
 
             // Calculate direction, make length=1 via .normalized
             Vector2 dir = new Vector2(1, y).normalized;
 
             // Set Velocity with dir * speed
             GetComponent<Rigidbody2D>().velocity = dir * speed;
         }
 
         // Hit the right Racket?
         if (col.gameObject.name == "RacketRight")
         {
             // Calculate hit Factor
             float y = hitFactor(transform.position,
                                 col.transform.position,
                                 col.collider.bounds.size.y);
 
             // Calculate direction, make length=1 via .normalized
             Vector2 dir = new Vector2(-1, y).normalized;
 
             // Set Velocity with dir * speed
             GetComponent<Rigidbody2D>().velocity = dir * speed;
         }
         if (col.gameObject.name == "WallLeft")
         {
             SceneManager.LoadScene("RightSide Scene");
         }
         if (col.gameObject.name == "WallRight")
         {
             SceneManager.LoadScene("LeftSide Scene");
         }
         if (col.gameObject.name == "WallLeft")
         {
             //Points Adding Goes Here
         }
     }
 }
 

Sorry for the messy notes. Look at the bottom to see where I am needing a code to make it work. Please help me with this :)