.box {
  width:200px;
  height: 200px;
  background-color: #393;
  Animation-name : slide;
  animation-duration: 5s;
  animation-timing-function: linear;
  animation-iteration-count: 12;
  animation-direction: alternate;
  animation-play-state: paused;
}

button {
  padding: 0.5em 1em;
  border: 1px solid #999;
  border-radius:10%;
  margin-top:1.5em;
  
  
}
@keyframes slide {
  to {
    transform:translate(600px, 0px);
  }
  
}
img[alt="CSS Validate"], img[alt="html5 Validate"] {
	 width:64px;
	 height:22px;
	display:inline-block;
	
	 margin: 10px auto;
	 text-align:center;
	 }
	 div.val {
		width:100%;
		text-align:left;
		margin:20px auto;}