Cave generation code broken. Need some help please!

Hi!

Recently I started making a Starbound type game for experience but I ran into a major problem when some code didn't do anything.

Here is the code:

 using UnityEngine;
 using System.Collections;
 
 public class MapGenerator : MonoBehaviour {
 
     public int width;
     public int height;
     
     private enum Cubes
     {
         Yes,
         No
     };
     private Cubes [,] map;
     
     [Range (0, 100)]
     public int fillPercent;
     
     private int tiles;
     
     private int CalculateWalls (int x, int y) {
         int neighbors = 0;
         for (int x2 = x - 1; x2 < x + 1; x2 ++)
         {
             for (int y2 = y - 1; y2 < y + 1; y2 ++)
             {
                 if (x2 != -1 && x2 != width && y2 != -1 && y2 != height)
                 {
                     if (map [x2, y2] == Cubes.Yes)
                     {
                         neighbors ++;
                     }
                 }
             }
         }
         return neighbors;
     }
     
     void Start () {
         CreateMap ();
     }
     
     void CreateMap () {
         map = new Cubes [width, height];
         FillMap ();
     }
     
     void FillMap () {
         for (int x = 0; x < width; x ++)
         {
             for (int y = 0; y < height; y ++)
             {
                 int randomizer = Random.Range (0, 9);
                 if (randomizer == 0)
                 {
                     if (tiles / (width * height) * 100 < fillPercent)
                     {
                         map [x, y] = Cubes.Yes;
                         tiles ++;
                     }
                     else
                     {
                         Debug.Log ("Over fill percentage.");
                     }
                 }
                 else
                 {
                     map [x, y] = Cubes.No;
                 }
             }
         }
         for (int i = 0; i < 5; i ++)
         {
             SmoothMap ();
         }
     }
     
     void SmoothMap () {
         for (int x = 0; x < width; x ++)
         {
             for (int y = 0; y < height; y ++)
             {
                 int neighbors = CalculateWalls (x, y);
                 Debug.Log (neighbors);
                 if (neighbors > 4)
                 {
                     map [x, y] = Cubes.No;
                 }
             }
         }
     }
     
     void OnDrawGizmos () {
         for (int x = 0; x < width; x ++)
         {
             for (int y = 0; y < height; y ++)
             {
                 Vector2 pos = new Vector2 (x + 0.5f - width / 2, y + 0.5f - height / 2);
                 if (map != null)
                 {
                     if (map [x, y] == Cubes.Yes)
                     {
                         Gizmos.color = Color.red;
                     }
                     else
                     {
                         Gizmos.color = Color.green;
                     }
                     Gizmos.DrawCube (pos, Vector3.one);
                 }
             }
         }
     }
 }
 

I set the fill percent to 75, but it doesn't seem to even consider the fill percentage, and it also freezes (maybe because of a lot of debugging) when adding this line, line 84:

 Debug.Log (neighbors);

It doesn't make sense, because it is only called 5 times so I don't understand what's wrong. It is called 5 times because a for loop executes 5 times in a void called in Start, and after that it calls the void Smooth every loop. Doesn't make any sense.

I set the width and height to 100.

I will greatly appreciate any and all help, Cheers!