title: CloudFormation: simple example
body: <p>I would like to build EC2 behind ELB(Elastic Load Balancer). </p>
  
  <p><a href="https://i.stack.imgur.com/KCaBp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KCaBp.png" alt="enter image description here"></a></p>
  
  <p>What would be the yaml/json code of doing this?</p>