<div id="block">click me</div>

#block{
  	position:absolute;
    left: 100px;
    top: 50%;
    width: 100px;
    height: 100px;
    margin: -50px 0 0 -50px;
    background: #0c8;
    line-height: 100px;
    text-align: center;
    color: #fff;
    cursor: pointer;
}

var stats = new Stats();
stats.showPanel( 0 );  
document.body.appendChild( stats.dom );
block.addEventListener('click', function(){
    stats.begin();
    var self = this, startTime = Date.now(),
        distance = 500, duration = 5000;
    
  	requestAnimationFrame(function step(){
      var p = Math.min(1.0, (Date.now() - startTime) / duration);
      self.style.transform = 'translateX(' + (distance * p) +'px)';
      if(p < 1.0) {
        requestAnimationFrame(step);
        stats.end();
      } 
    });
  });