watermark.js

          
/**
 * Place a watermark
 */
function placeMark(i) {
  watermark(['img/shepherd.jpg', 'img/logo.png'])
    .image(watermark.image.lowerRight())
    .then(function (img) {
      var container = document.getElementById('image-' + (i + 1));
      container.appendChild(img);
    });
}

/**
 * Queue up a bunch of async watermark operations
 */
 for(var i = 0; i < 9; i++) {
   setTimeout((function(index) {
     return function() {
       placeMark(index);
     };
   })(i), 10);
 }