@keyframes slidy {
0% { left:  0%; }
5% { left:  0%; }
10% { left: -100%; }
15% { left: -100%; }
20% { left: -200%; }
25% { left: -200%; }
30% { left: -300%; }
35% { left: -300%; }
40% { left: -400%; }
45% { left: -400%; }
50% { left: -500%; }
55% { left: -500%; }
60% { left: -600%; }
65% { left: -600%; }
70% { left: -700%; }
75% { left: -700%; }
80% { left: -800%; }
85% { left: -800%; }
90% { left: -900%;}
100% { left: -900%;}
}

body { margin: 0; } 
div#slider { overflow: hidden; }
div#slider figure img { width: 10%; float: left; }
div#slider figure { 
  position: relative;
  width: 1000%;
  margin: 0;
  left: 0;
  text-align: left;
  font-size: 0;
  animation: 100s slidy infinite;
}