unity3d create cube from script

unity_generate_cube.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

[ExecuteInEditMode]
public class monkey : MonoBehaviour {

	private Mesh mesh;
	private List<Vector3> verts = new List<Vector3>(){
		new Vector3(1f, 1f, -1f),
		new Vector3(1f, -1f, -1f),
		new Vector3(-1f, -1f, -1f),
		new Vector3(-1f, 1f, -1f),
		new Vector3(1f, 0.999999f, 1f),
		new Vector3(0.999999f, -1f, 1f),
		new Vector3(-1f, -1f, 1f),
		new Vector3(-1f, 1f, 1f)
	};
	private List<Vector2> uvs = new List<Vector2> (){
	};
	
	private List<int> triangles = new List<int> (){
		4,0,3,
		4,3,7,
		2,6,7,
		2,7,3,
		1,5,2,
		5,6,2,
		0,4,1,
		4,5,1,
		4,7,5,
		7,6,5,
		0,1,2,
		0,2,3,
	};

	// Use this for initialization
	void Start () {
		//mesh = new Mesh();
		mesh = GetComponent<MeshFilter>().mesh;
		BuildMesh();
	}
	
	// Update is called once per frame
	void Update () {
	
	}

	void BuildMesh ()
	{
		mesh.Clear ();
		mesh.vertices = verts.ToArray();
		mesh.triangles = triangles.ToArray();
		//mesh.uv = uvs.ToArray();
		mesh.Optimize ();
		mesh.RecalculateNormals ();
	}
}