@keyframes scroll {
  0% {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }
  100% {
    -webkit-transform: translateX(calc(-250px * 8));
    transform: translateX(calc(-250px * 8));
  }
}

.slider {
  height: 100px;
  margin: auto;
  overflow: hidden;
  position: relative;
  width: 100%;
  margin-top: 20px;
}

.slider::before {
  left: 0;
  top: 0;
}

.slider .slide-track {
  -webkit-animation: scroll 30s linear infinite;
  animation: scroll 30s linear infinite;
  display: flex;
  width: calc(250px * 8);
}

.slider .slide {
  height: 100px;
  width: 250px;
}