js에서 텍스트 목록을 원활하게 스크롤하는 방법은 무엇입니까?

<p id="rule">
        <p class="list" id="list">
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
          <p>用户185****0000  获得XXX优惠券</p>
        </p>
   <p class="list2" id="list2"></p>
</p>

var speed=50;
var list=document.getElementById('list');
var list2=document.getElementById('list2');
var rule=document.getElementById('rule');
list2.innerHTML=list.innerHTML;
function Marquee(){
  if(list2.offsetTop-rule.scrollTop<=0)
    rule.scrollTop-=list.offsetHeight;
  else{
    rule.scrollTop++;
  }
}
var MyMar=setInterval(Marquee,speed);
rule.onmouseover=function() {clearInterval(MyMar)}
rule.onmouseout=function() {MyMar=setInterval(Marquee,speed)}