Draw square in Android RenderScript

Modify MyRSSurfaceView.java from last exercise "Perform transform of Translate and Rotate on RenderScript", to draw square by combine two Triangle.

package com.exercise.AndroidRenderScript;

import android.content.Context;
import android.renderscript.Mesh;
import android.renderscript.RSSurfaceView;
import android.renderscript.RenderScriptGL;
import android.renderscript.RenderScriptGL.SurfaceConfig;

public class MyRSSurfaceView extends RSSurfaceView {
 
 private RenderScriptGL renderScriptGL;
 private ScriptC_RenderScript myScriptC;

 public MyRSSurfaceView(Context context) {
  super(context);
  // TODO Auto-generated constructor stub
  final RenderScriptGL.SurfaceConfig surfaceConfig
   = new SurfaceConfig();
  renderScriptGL = createRenderScriptGL(surfaceConfig);
  
  myScriptC = new ScriptC_RenderScript(
    renderScriptGL, getResources(), R.raw.renderscript);

  myScriptC.set_my_rs_mesh(createMesh());
  
  renderScriptGL.bindRootScript(myScriptC);
 }
 
 private Mesh createMesh(){
  Mesh.TriangleMeshBuilder myMesh 
  = new Mesh.TriangleMeshBuilder(
    renderScriptGL, 
    2, 
    Mesh.TriangleMeshBuilder.COLOR);
  /*  0   2
   *   +---+
   *   |\  |
   *   | \ |
   *   |  \|
   *   +---+
   *   1   3
   */  
  
  
  myMesh.addVertex(0, 0);  //- 0
  myMesh.addVertex(0, 100); //- 1
  myMesh.addVertex(100, 0); //- 2
  myMesh.addVertex(100, 100); //- 3
  
  myMesh.addTriangle(0, 1, 3);
  myMesh.addTriangle(0, 3, 2);

  return(myMesh.create(true));
 };

}

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