I am using line renderer to shoot lasers, my code doesnt show any errors but I cant see the laser in my game. How do i resolve it?

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

public class LaserMovement : MonoBehaviour {

 // Use this for initialization
 LineRenderer lr;


 void Start () 
 {
     lr = gameObject.GetComponent<LineRenderer> ();
     lr.enabled = false;

 }
 
 // Update is called once per frame
 void Update () 
 {
     if (Input.GetButton ("Fire1")) 
     {
         StopCoroutine ("FireLaser");
         StartCoroutine ("FireLaser");
     }
 }

 IEnumerator FireLaser ()
 {
     lr.enabled =true;
     while (Input.GetButton ("Fire1")) 
     {
         Ray r1 = new Ray (transform.position, transform.forward);
         RaycastHit hit;
         lr.SetPosition (0, r1.origin);

         if (Physics.Raycast (r1, out hit, 100)) {
             lr.SetPosition (1, hit.point);
             if (hit.rigidbody) {
                 hit.rigidbody.AddForceAtPosition (transform.forward * 5, hit.point);
                 Debug.DrawLine(r1.origin, hit.point, Color.red);
             }
         } 

         else 
         {
             lr.SetPosition (1, r1.GetPoint (100));
         }
         yield return null;
     }

      lr.enabled = false;
 }

}