Two HTML section each of which has its own controller.

index.html

<section ng-controller="HelloController">
    <h4>AngularJS Greeting</h4>
    <label for="name">Type your name here:</label>
    <input id="name" type="text" ng-model="myModel">
    <p>Hello {{myModel}}!</p>
  </section>
  <section ng-controller="GoodbyeController">
    <h4>AngularJS Farewell</h4>
    <label for="fName">Type your name here:</label>
    <input id="fName" type="text" ng-model="myModel">
    <p>Goodbye {{myModel}}!</p>
  </section>