n
  var normalBuffer = gl.createBuffer();
  // Bind it to ARRAY_BUFFER (think of it as ARRAY_BUFFER = normalBuffer)
  gl.bindBuffer(gl.ARRAY_BUFFER, normalBuffer);
  // Put normals data into buffer
  setNormals(gl);

  // Turn on the normal attribute
  gl.enableVertexAttribArray(normalLocation);

  // Tell the attribute how to get data out of normalBuffer (ARRAY_BUFFER)
  var size = 3;          // 3 components per iteration
  var type = gl.FLOAT;   // the data is 32bit floating point values
  var normalize 