I want to javascript for button with countdown

JavaScript
1

Can you please help me by creating such javascript code which can load a certain button after a fixed time and also for fixed interval of time.
Like I want my site to show a hyperlink button after every five hours and for 20 min in each time. And disappear is the rest time.
I am stuck here and didn’t know how to do that. Any ideas…??

2

Hey, this code displays a button after 5 seconds. The button will stay on the screen for 5 seconds, then it will vanish again. It will reappear after 5 seconds for a further 5 seconds and so on. This is a rather naive implementation, but it should serve you as a starting point for attempting to do what you want.

<!DOCTYPE HTML>
<html>
  <head>
    <meta charset="utf-8">
    <title>Show/hide button</title>
  </head>
  <body>
    <button id="myButton">Click Me!</button>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
    <script>
      function hideButton(){
        $("#myButton").hide();
        setTimeout( () => { displayButton(); }, 5000);
      }

      function displayButton(){
        $("#myButton").show();
        setTimeout( () => { hideButton(); }, 5000);
      }

      hideButton();
    </script>
  </body>
</html>
3

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