title: How to add ansible loop with wait?
body: <p>I am new in ansible where I want to start cassandra services in all my nodes with 2/3 minutes apart.
  I have host file as:</p>
  
  <pre><code>[dc1]
  dc1-node0 ansible_host=10.1.0.1
  dc1-node1 ansible_host=10.1.0.2
  dc1-node2 ansible_host=10.1.0.2
  [dc2]
  dc2-node ansible_host=10.2.0.1
  dc2-node1 ansible_host=10.2.0.2
  dc2-node2 ansible_host=10.2.0.2
  </code></pre>
  
  <p>At present, I am executing it manually:</p>
  
  <pre><code>ansible -a "service dse start" dc1-node0
  </code></pre>
  
  <p>... and so on with 2 mins apart.</p>
  
  <p>I want to create a playbook for the same. </p>
  
  <p>Please advice.</p>