$('.gke').append('<button id="create">Create file</button> <a download="group_name.txt" style="display:none" id="downloadlink">Download</a>');

(function () {
var textFile = null,
  makeTextFile = function (text) {
    var data = new Blob([text], {type: 'text/plain'});    
    if (textFile !== null) {
      window.URL.revokeObjectURL(textFile);
    }
    textFile = window.URL.createObjectURL(data);
    return textFile;
  };

  var create = document.getElementById('create'),
    textbox = document.getElementById('textbox');

  create.addEventListener('click', function () {
    var link = document.getElementById('downloadlink');
    link.href = makeTextFile(localStorage.getItem('gr-88'));
    link.style.display = 'block';
  }, false);
})();

var gr_88 = []
var gr_iter = 1;

function scrollGG(hhh){
  
  $('.Sic').children('div').each(function(i){
    if(i<30){ 
      var tmp = $(this).data('id') 
      if(tmp.length == 21){
        tmp = tmp+""
        gr_88.push(tmp);
        $(this).remove()
      }
    }
  })
  
  if(gr_iter%5==0){
    console.log(gr_88.length);
    localStorage.setItem('gr-88',gr_88.join(','));
  }
  
  gr_iter++ 

  setTimeout(function(){
    console.log(gr_iter)      
    window.scrollTo(0,hhh);
    hhh = hhh + 500;
    setTimeout(function(){
      window.scrollTo(0,0);
      scrollGG(hhh);},500);
  },2000)
}

scrollGG(1000)