html, body {
  margin: 0;
  padding: 0;
  font-family: Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
.container {
  width: 100%;
}
.timer {
  height: 1%;
  width: 0%;
  position: absolute;
  left: 0;
  bottom: 0;
  background: #09f;
  z-index: 10;
}
.slideshow {
  position: relative;
  height: 100%;
}
.slide {
  width: 100%;
  height: 100%;
  background: #ffffff;
  color:#ffffff;
  text-align: center;
  line-height: 320px;
  font-size: 640px;
  }

 .slide { display: none;}