page.js

var app;

app = angular.module('test_angular_animation', ['ngAnimate']);

app.controller('mycontroller', function($scope, $timeout) {
  var tick;
  $scope.things = [];
  $scope.target_list_size = 12;
  $scope.cycles_per_second = 3;
  tick = function() {
    var i, n, newthing, probability_of_adding, r;
    n = $scope.things.length;
    probability_of_adding = 1 - n / ($scope.target_list_size * 2);
    r = Math.random();
    if (r < probability_of_adding) {
      newthing = new Array(Math.floor(r * 100)).join("-");
      newthing += String(r).substr(2, 5);
      $scope.things.push(newthing);
    } else {
      i = Math.floor(Math.random() * $scope.things.length);
      $scope.things.splice(i, 1);
    }
    $scope.things.sort();
    return $timeout(tick, 1000 / $scope.cycles_per_second);
  };
  return tick();
});