Question Create a new dot which automatically connects to line renderer and creates a polygon

I am making a game which has dots in it which are connected by lines and create a polygon. You can drag them. When I click UpArrow key, it should create a new dot and add it to the polygon. Here teme and temena means dot and dots:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class LineController : MonoBehaviour
6. {
7.     private LineRenderer lr;
8.     public List<Transform> temena;
9.     public BrojTemenaPromena script;
10.     private Vector3 spawnPoint = new Vector3(0, 0, 0);
11.     //private Quaternion spawnQuaterion = new Quaternion(1, 0, 0, 0);
12.     public GameObject objectToSpawn;
13.     void Awake()
14.     {
15.         lr = GetComponent<LineRenderer>();
16.     }
17.     void Start()
18.     {
19.         lr = GetComponent<LineRenderer>();
20.         SetUpLine(temena);
21.     }
22.     void Update()
23.     {
24.         StvaranjeTemena();
25.         SetLinePosition(temena);
26.     }
27.  
28.     public void SetUpLine(List<Transform> temena)
29.     {
30.         lr.positionCount = temena.Count + 1;
31.         this.temena = temena;
32.     }
33.     public void SetLinePosition(List<Transform> temena)
34.     {
35.         for (int i = 0; i < temena.Count; i++)
36.         {
37.             lr.SetPosition(i, temena[i].position);
38.         }
39.         lr.SetPosition(temena.Count, temena[0].position);
40.         this.temena = temena;
41.     }
42.     private void StvaranjeTemena()
43.     {
44.         if (Input.GetKeyDown(KeyCode.UpArrow))
45.         {
46.             Instantiate(objectToSpawn, spawnPoint, Quaternion.identity);
47.             temena.Add(objectToSpawn.transform);
48.             script.brojTemenaText.text = temena.Count.ToString();
49.             SetUpLine(temena);
50.             SetLinePosition(temena);
51.         }
52.     }
53. }
54.  

 

Also, StvaranjeTemena() means creating dots/vertices