Unity: Stupid Simple Tron

UnbreakableCollider.cs

using UnityEngine;
using System.Collections;
public class UnbreakableCollider : MonoBehaviour
{
    public Transform DotPrefab;
    Vector3 lastDotPosition;
    bool lastPointExists;
    
    void Update()
    {
        //testing script
       /* lastPointExists = false;
        MakeADot(new Vector3(10, 0, 0));
        MakeADot(new Vector3(5, 10, 0));
        MakeADot(new Vector3(7, 7, 7));
        MakeADot(new Vector3(0, 0, 0));
        MakeADot(new Vector3(0, 10, 10));*/

        MakeADot(this.transform.position);
    }
    
    void MakeADot(Vector3 newDotPosition)
    {
        Transform dot =(Transform) Instantiate(DotPrefab, newDotPosition, Quaternion.identity); //use random identity to make dots looks more different
        if (lastPointExists)
        {
            GameObject colliderKeeper = new GameObject("collider");
            BoxCollider bc = colliderKeeper.AddComponent<BoxCollider>();
            colliderKeeper.transform.position = Vector3.Lerp(newDotPosition, lastDotPosition, 0.5f);
            colliderKeeper.transform.LookAt(newDotPosition);
            bc.size = new Vector3(1f, 0.1f, Vector3.Distance(newDotPosition, lastDotPosition));
        }
        lastDotPosition = newDotPosition;
        lastPointExists = true;
    }
}