PGraphicsOpenGL mainGL;  // the main screen

  PGL pgl;  // make raw GL calls here

  mainGL = (PGraphicsOpenGL)g;

  pgl = mainGL.beginPGL();

  int numVerts = 32;

  float[] verts = new float[numVerts*2];  //xyxyxyxyxyxy

  for(int i = 0; i < verts.length; i++){

    verts[i] = random(512.0);

  }

  FloatBuffer vertexBuffer = FloatBuffer.wrap(verts);

  int[] vboIDs = new int[1];

  pgl.glGenBuffers(1, vboIDs, 0);

  pgl.glBindBuffer(pgl.GL_ARRAY_BUFFER, vboIDs[0]);

  pgl.glBufferData(pgl.GL_ARRAY_BUFFER, numVerts*2*4, vertexBuffer, pgl.GL_STATIC_DRAW);

  pgl.glBindBuffer(pgl.GL_ARRAY_BUFFER, vboIDs[0]);

  pgl.glVertexAttribPointer(0, 2, pgl.GL_FLOAT, false, numVerts*2*4, 0);

  pgl.glEnableVertexAttribArray(0);

  mainGL.endPGL();