var awardsList = $(‘#sep2016fList‘);  if(awardsList.find(‘li‘).size()>4){    onescroll();  }  function onescroll(){      var oul=awardsList;      function c(){          oul.animate({marginTop:‘-1.75rem‘},800,‘ease-out‘,function(){              $(this).css({marginTop:‘0px‘}).find(‘li:first‘).appendTo(this);               console.log($(this),this);          });      }      setInterval(c,2000);  }

<ul id="sep2016fList" style="margin-top: -1.75rem; transition-property: margin-top; transition-duration: 0.8s; transition-timing-function: ease-out;">　　<li><span>8元现金券</span>139****0001</li>
　　<li><span>88元现金券</span>139****0001</li>
　　<li><span>38元现金券</span>139****0001</li>
　　<li><span>18元现金券</span>139****0001</li>
　　<li><span>8元现金券</span>139****0001</li>
　　<li><span>38元现金券</span>139****0001</li>
　　<li><span>8元现金券</span>139****0001</li>
　　<li><span>38元现金券</span>139****0001</li>
　　<li><span>68元现金券</span>132****0001</li>
</ul>