Пожалуйста помогите Я написал скрипт и 2 часа не могу найти там ошибку

// Вы при помощи блокнота редактируете скрипты?
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class GameController : MonoBehaviour
{
private CubePos nowCube = new CubePos(0, 1, 0);
private float cubeChangePlaceSpeed = 0.5f;
public Transform cubeToPlace;

private List< Vector3 > allCubesPositions = new List< Vector3 >
{
new Vector3(0,0,0),
new Vector3(1,0,0),
new Vector3(-1,0,0),
new Vector3(0,1,0),
new Vector3(0,0,1),
new Vector3(0,0,-1),
new Vector3(1,0,1),
new Vector3(-1,0,-1),
new Vector3(-1,0,1),
new Vector3(1,0,-1),
};

private void Start()
{
StartCoroutine(ShowCubePlace());
}

IEnumerator ShowCubePlace()
{
while (true)
{
SpawnPositions();

yield return new WaitForSeconds(cubeChangePlaceSpeed);
}
}

private void SpawnPositions()
{
List< Vector3 > positions = new List< Vector3 >();
if (IsPositionEmpty(new Vector3(nowCube.x + 1, nowCube.y, nowCube.z)) &&
nowCube.x + 1 != cubeToPlace.position.x)
positions.Add(new Vector3(nowCube.x + 1, nowCube.y, nowCube.z));

if (IsPositionEmpty(new Vector3(nowCube.x - 1, nowCube.y, nowCube.z)) &&
nowCube.x - 1 != cubeToPlace.position.x)
positions.Add(new Vector3(nowCube.x - 1, nowCube.y, nowCube.z));

if (IsPositionEmpty(new Vector3(nowCube.x, nowCube.y + 1, nowCube.z)) &&
nowCube.y + 1 != cubeToPlace.position.y)
positions.Add(new Vector3(nowCube.x, nowCube.y + 1, nowCube.z));

if (IsPositionEmpty(new Vector3(nowCube.x, nowCube.y - 1, nowCube.z)) &&
nowCube.y - 1 != cubeToPlace.position.y)
positions.Add(new Vector3(nowCube.x, nowCube.y - 1, nowCube.z));

if (IsPositionEmpty(new Vector3(nowCube.x, nowCube.y, nowCube.z + 1)) &&
nowCube.z + 1 != cubeToPlace.position.z)
positions.Add(new Vector3(nowCube.x, nowCube.y, nowCube.z + 1));

if (IsPositionEmpty(new Vector3(nowCube.x, nowCube.y, nowCube.z - 1)) &&
nowCube.z - 1 != cubeToPlace.position.z)
positions.Add(new Vector3(nowCube.x, nowCube.y, nowCube.z - 1));

cubeToPlace.position = positions[UnityEngine.Random.Range(0, positions.Count)];
Debug.Log(positions.Count);
}

private bool IsPositionEmpty(Vector3 targetPos)
{
if (targetPos.y == 0)
return false;

foreach (Vector3 pos in allCubesPositions)
{
if (pos.x == targetPos.x & pos.y == targetPos.y & pos.z == targetPos.z)
return false;
}
return true;

}

struct CubePos
{
public int x, y, z;

public CubePos(int x, int y, int z)
{
this.x = x;
this.y = y;
this.z = z;
}

public Vector3 getVector()
{
return new Vector3(x, y, z);
}

public void setVector(Vector3 pos)
{
x = Convert.ToInt32(pos.x);
y = Convert.ToInt32(pos.y);
z = Convert.ToInt32(pos.z);
}
}
}

Может быть переменную создаешь несколько раз подрят с одним и темже названием