title: How to get current seconds left to complete hour?
body: <p>I want to get how many seconds are remaining to complete an hour. No matter which what time it is?</p>
  
  <p>if its 05:01:00 then it should give 3540 seconds
  and if its 11:58:40 then it gives 80 seconds and so on. I try to find it on google but could not able to find it.
  Thanks in advance.</p>