// Create function
function waitScrape(class_name)
{
 console.log("Starting");
 var buttons = document.getElementsByClassName(class_name);
  for(i = 0; i <= buttons.length; i++) {
    setTimeout(function () {
     // register click event
      buttons[i].click();
     // Set wait time for 3 seconds (3000 milliseconds)
    }, 3000);
  }
}

// Initiate function
waitsScrape('UnFollowUser');