@keyframes yellowfade {
  from {
    background: yellow;
  }
  to {
    background: transparent;
  }
}

p.item-highlight {
  animation: yellowfade 1s;
}

p.item {
  padding: 10px;
}

/*
$(function() {
  $('.add-more').on('click', function(e) {
    e.preventDefault();
    var first = $('.item').first().clone().addClass('item-highlight');
    first.appendTo('.items-container');
    first.on('animationend', function() {
    	first.removeClass('item-highlight');
    });
  });
});

*/