gistfile1.js

jQuery(function($) {
  // create a layout class
  var Layout = Backbone.Marionette.Layout.extend({
    template: _.template($('#modals-template').html()),
    regions: {
      modals: {
        selector:   '.modals-container',
        regionClass: Backbone.Marionette.Modals
      }  
    }
  });

  // create a modal view class
  var Modal = Backbone.Modal.extend({
    template: _.template($('#modal-template').html()),

    viewContainer: '.modal-view',

    views: {
      'click #first': {
        view: _.template($('#modal-view1-template').html())
      },
      'click #second': {
        view: _.template($('#modal-view2-template').html())
      }
    }
  });

  var myLayout = new Layout();
  $('body').append(myLayout.render().el);

  myLayout.modals.show(new Modal());
  myLayout.modals.show(new Modal());
});