Untitled

Playing around with WebGL and Canvas, but having some difficulties changing data in JSON file
[
    'seriesA', [ latitude, longitude, magnitude, latitude, longitude, magnitude, ... ]
  ],
  [
    'seriesB', [ latitude, longitude, magnitude, latitude, longitude, magnitude, ... ]
]

xhr = new XMLHttpRequest();
 xhr.open('GET', '/globe/test.json', true);
  xhr.onreadystatechange = function(e) {
    if (xhr.readyState === 4) {
      if (xhr.status === 200) {
        var data = JSON.parse(xhr.responseText);
        window.data = data;
        for (i=0;i<data.length;i++) {
          globe.addData(data[i][1], {format: 'magnitude', name: data[i][0], animated: true});
        }
        globe.createPoints();
        settime(globe,0)();
        globe.animate();
      }
    }
  };
  xhr.send(null);