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<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>

<div ng-app="myApp" ng-controller="myCtrl"> 

<p>This header will change after two seconds:</p>

<h1>{{myHeader}}</h1>

</div>

<p>The $timeout service runs a function after a sepecified number of milliseconds.</p>

<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope, $timeout) {
  $scope.myHeader = "Hello World!";
  $timeout(function () {
      $scope.myHeader = "How are you today?";
  }, 2000);
});
</script>

</body>
</html>