var tmp = $;
// Set an interval
setInterval(function() {
  // Get the amount of actions left
  var actionsLeft = parseInt(tmp('.action-timer__text').textContent.split(' ')[2]);

  // If amount of actions left is anywhere between 5-20
  if (actionsLeft < Math.floor(Math.random() * (20 - 5 + 1) + 5)) {
    // Trigger click on .action-timer (might be the wrong element), might be protected as well, no idea.
    tmp('.action-timer').click();
  // Repeat every 5 seconds
}, 5000);