效果演示：进入文章页面后随意点击。

(function(texts, colors, class_name){
 document.addEventListener('click', function(e){
   var span = document.createElement('span');
    clearInterval(span.timer);
    span.innerHTML = texts[parseInt(Math.random()*texts.length)];
   span.style = 'position:absolute;pointer-events:none;cursor:none;left:' + e.pageX + 'px;top:' + e.pageY +'px;color:#' + colors[parseInt(Math.random()*colors.length)];
   document.body.appendChild(span);
    var span_top = parseInt(span.style.top);
    var opacity = getComputedStyle(span)['opacity'];
    var speed = parseInt(Math.random()*20+10);//随机10-30的速度
    span.timer = setInterval(function(){
      span_top--;
     opacity -= 0.005;
     span.style.top = span_top + 'px';
     span.style.opacity = opacity;
     if(opacity<=0){
        clearInterval(span.timer);
        document.body.removeChild(span);
      }
   }, speed);
  }); 
})(['富强','民主','文明','和谐','自由','平等','公正','法治','爱国','敬业','诚信','友善'], ['ee217c','3c2213','1d1c21','662e93','0f75bd','73b146','bdbec2','f1592a','c01d2e','fcb040','056839','283a8e'])