anchor.diff:  
   WebGL.Buffer triVertexBuffer;
   WebGL.Buffer quadVertexBuffer;
  +WebGL.Program shaderProgram;
  +int positionLoc = -1;
  +WebGL.UniformLocation mvMatrixLoc;
  +WebGL.UniformLocation projMatrixLoc;
  +
  +Matrix4 projMatrix;
  +Matrix4 mvMatrix;
   
   void init()
   {
  
positive.code:   * written by peter (shader coder)
    * 
  */
  
  
  import "dart:html";
  import "package:vector_math/vector_math.dart";
  
negative.code:   
    void main()
    {
       gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
    }
    """;
    
  