.slider {
  width: 100%;
  top: calc(50% - 97.25px);
  overflow: hidden;
}
.slider .slider-row {
  width: 2956px;
  height: 194.5px;
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/111863/ubiquity-summit-web-01.png);
  background-size: 2956px 194.5px;
  animation: slide 20s linear infinite;
}

@keyframes slide {
  from {
    background-position-x: 0;
  }
  to {
    background-position-x: -2956px;
  }
}