Make a high poly count plane with code

Okay, so, I've been searching for this question all day and have yet to get anywhere. With a bunch of aids I've been able to make a low poly plane with code, that has 4 verts and 2 tris, But I want it to be more than that.

I have everything set to an array that can be adjusted on the start of the game, that makes several points in a 2D grid, and I'm trying to make it so that it makes a vertex and a connecting triangle across all the points.. But it just seems to make a stretched out plane of 4 verts and 2 tris... What step am I missing, and is it a simple fix that I just can't find?

Here's the code thus far:

 var Landsize : int;
 var size : float;
 var Land : GameObject;
 var scale : float = 1.0;
 var power : float = 3.0;
 var Adj : float;
 var Grid : Vector3[,];
 var NewPos : Vector3;
 private var Sample : Vector2 = new Vector2(0f,0f);
 function Start()
 {
     var Width : float = Landsize;
     var Height : float = Landsize;
     Grid = new Vector3[Landsize,Landsize];
     Sample = new Vector2(Random.Range(0.0f,size),Random.Range(0.0f,size));
     var m : Mesh = new Mesh();
     m.name = "Scripted_Plane_New_Mesh";
        for(var yCount=0;yCount<Landsize;yCount++)
     {
         Width -= Landsize;
         Height += Adj;
         for(var xCount=0;xCount<Landsize;xCount++)
         {
             Width += Adj;
             NewPos += Vector3(Width,0.01,Height);
             Grid[yCount,xCount] = NewPos;    
         }
 
     }
     for(var Point : Vector3 in Grid)
     {
         m.vertices = [Vector3(-Point.x, 0.01, -Point.z), Vector3(Point.x, 0.01, -Point.z), Vector3(Point.x, 0.01, Point.z), Vector3(-Point.x, 0.01, Point.z)];
          m.uv = [Vector2 (0, 0), Vector2 (0, 1), Vector2(1, 1), Vector2 (1, 0)];
           m.triangles = [0, 1, 2, 0, 2, 3];
            m.RecalculateNormals();
        }
     var obj : GameObject = new GameObject("New_Plane_Fom_Script", MeshRenderer, MeshFilter, MeshCollider);
     obj.GetComponent(MeshFilter).mesh = m;
     obj.transform.position = Vector3.zero;
     obj.transform.tag = "Land";
     Land = obj;
     MoveIt();
 }

"MoveIt();" takes all the vertices from the object that was just spawned from the code and moves it along a Perlin texture, which that part thus far works just fine, but there needs to be a -lot- more vertices for it to make a difference.