Code:-

<script>
  setTimeout(function() {
    window.open(" your link ", "Popup", "width=300,height=300");
  }, 31000);
</script>
<script>
  setTimeout(function() {
    window.open("your link1", "Popup", "width=300,height=300");
  }, 62000);
</script>
<script>
  setTimeout(function() {
    window.open(" your link2", "Popup", "width=300,height=300");
  }, 151000);
</script>
<script>
  setTimeout(function() {
    window.open(" your link3", "Popup", "width=300,height=300");
  }, 201000);
</script>
<script>
  setTimeout(function() {
    window.open(" your link4", "Popup", "width=300,height=300");
  }, 251000);
</script>
<script>
  setTimeout(function() {
    window.open('your link5', 'Popup', 'width=300,height=300');
  }, 10000);
</script>
<script>
  setTimeout(function() {
    window.open('your link6', 'Popup', 'width=300,height=300');
  }, 15000);
</script>
<script>
  setTimeout(function() {
    window.open('your link7', 'Popup', 'width=300,height=300');
  }, 20000);
</script>
<script>
  setTimeout(function() {
    window.open('your link8', 'Popup', 'width=300,height=300');
  }, 25000);
</script>
<meta http-equiv="refresh" content="300;URL=https://t.co/0vOL8qpvf4" />


Note:-
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