hi guys i want to generate a simple mesh at runtime and then use it for my object's mesh renderer but i can not see anything on the screen. i think my problem is with setting triangles. is there anyone that he knows how should i set triangles and what are the different approaches for setting triangles vertecies?

this is my code

using UnityEngine;
using System.Collections;
public class album : MonoBehaviour
{
    public Texture2D tex;
    Mesh m;
    IEnumerator Start()
    {
        yield return new WaitForSeconds(1f);
        m = new Mesh();
        m.vertices = new Vector3[5];
        m.uv = new Vector2[5];
        m.normals = new Vector3[5];
        m.normals[0] = new Vector3(0,0,-1); ;
        m.normals[1] = new Vector3(0, 0, -1);
        m.vertices[0].x = 0;
        m.vertices[0].y = 0;
        m.vertices[0].z = 0;
        m.uv[0] = new Vector2 (0,0);
        m.vertices[1].x = 1;
        m.vertices[1].y = 0;
        m.vertices[1].z = 0;
        m.uv[1] = new Vector2(1, 0);
        m.vertices[2].x = 0;
        m.vertices[2].y = -1;
        m.vertices[2].z = 0;
        m.uv[2] = new Vector2(0, 1);
        m.vertices[3].x = 1;
        m.vertices[3].y = -1;
        m.vertices[3].z = 0;
        m.uv[3] = new Vector2(1, 1);
        m.vertices[4].x = 0;
        m.vertices[4].y = 0;
        m.vertices[4].z = 0.3f;
        m.uv[4] = new Vector2(1, 1);
        m.triangles = new int[9];
        m.triangles[0] = 0;
        m.triangles[1] = 1;
        m.triangles[2] = 2;
        m.triangles[3] = 2;
        m.triangles[4] = 3;
        m.triangles[5] = 1;
        m.triangles[6] = 1;
        m.triangles[7] = 0;
        m.triangles[8] = 4;
        m.RecalculateBounds();
        MeshFilter mf = (MeshFilter)transform.GetComponent(typeof(MeshFilter));
        mf.mesh = m;
        renderer.material = new Material(Shader.Find(" Diffuse"));
        mf.renderer.material.mainTexture = tex;
    }
}