static S jsMandelbrotCreateCanvas() {
  ret [[
  // Create Or Get Canvas
  var myCanvas = document.getElementById("apfelcanvas");
  if (myCanvas == null) {
    myCanvas = document.createElement("canvas");
    myCanvas.id = 'apfelcanvas';
    myCanvas.width=1280/4;
    myCanvas.height=720/4;
    document.body.appendChild(myCanvas);
  }
  var ctx = myCanvas.getContext("2d");
  ]];
}