<!DOCTYPE html>
<html>

  <head>
    <link rel="stylesheet" href="style.css">
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.min.js"></script>
    <script src="script.js"></script>
  </head>

  <body ng-app="myApp">
    <div ng-controller="TestLocationCtrl">
      <button ng-click="set()">$location.hash('Hello')</button>
      <button ng-click="reset()">$location.hash('')</button>
    </div>
  </body>

</html>
// Code goes here

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

app.controller('TestLocationCtrl', [
  '$scope',
  '$location',
  function ($scope, $location) {
    $scope.set = function () {
      $location.hash('hello');
    };
    
    $scope.reset = function () {
      $location.hash('');
    };
  }
])
/* Styles go here */