var news1left=0;
var news2left=1480;

function geser() {
  news1left-=2;
  news2left-=2;
  if (news1left<=-1480)
  {
    news1left = news2left + 1480;
  }
  if (news2left<=-1480)
  {
    news2left = news1left + 1480;
  }
  document.getElementById('news1').style.left = news1left + 'px';
  document.getElementById('news2').style.left = news2left + 'px';
  setTimeout(function() { geser(); }, 100);
}