Procedural Generation

Well, I have knowledge of have but I'm new on C# and Unity, I've been trying to follow a tutorial wich generates a procedural terrain creating an empty object and modifying its mesh, I know this is probably a frecuently asked question but I couldn't find the solution, thanks in advance. This is the object wich has the script:

This is how it looks once the game starts:

And the Code:

     int Width;
     public Material floorMaterial;
     void Start(){
         Mesh mesh = new Mesh ();
         MeshRenderer renderer = GetComponent<MeshRenderer> ();
         Width = 10;
         int Samples = 5;
         float edge = Width / (Samples - 1);
         
         // Create the vertices and texture coords
         var vertices = new Vector3[Samples * Samples];  
         var uvs = new Vector2[Samples * Samples];
         
         // Fill in the data
         for (int i = 0, p = 0; i < Samples; i++) {  
             for (int j = 0; j < Samples; j++) {
                 // Current vertex
                 var center = new Vector3(i * edge, 0, j * edge);
                 // Height of this vertex (from heightmap)
                 float h = SampleHeight(center.x, center.z);
                 center.y = h;
                 vertices[p] = center;
                 // UV coords in [0,1] space
                 uvs[p++] = new Vector2(i/(Samples - 1f),
                                        j/(Samples - 1f));
             }
         }
         GetComponent<MeshFilter> ().mesh = mesh;
 
         mesh.vertices = vertices;
         mesh.uv = uvs;
         mesh.RecalculateNormals();
         mesh.RecalculateBounds();
         mesh.name = "Terrain";
         renderer.material = floorMaterial;
     }
     public float SampleHeight(float x, float y) {  
         return Mathf.PerlinNoise(x, y);
     }