body {

}
@-webkit-keyframes scroll {
0% {
-webkit-transform: translateX(0);
transform: translateX(0);
}
100% {
-webkit-transform: translateX(calc(-250px * 7));
transform: translateX(calc(-250px * 7));
}
}
@keyframes scroll {
0% {
-webkit-transform: translateX(0);
transform: translateX(0);
}
100% {
-webkit-transform: translateX(calc(-250px * 7));
transform: translateX(calc(-250px * 7));
}
}
.slider {
background: pr;

height: 100px;
margin: auto;
overflow: hidden;
position: relative;
width: 960px;
}
.slider::before, .slider::after {

content: "";
height: 100px;
position: absolute;
width: 200px;
z-index: 2;
}
.slider::after {
right: 0;
top: 0;
-webkit-transform: rotateZ(180deg);
transform: rotateZ(180deg);
}
.slider::before {
left: 0;
top: 0;
}
.slider .slide-track {
-webkit-animation: scroll 40s linear infinite;
animation: scroll 40s linear infinite;
display: flex;
width: calc(250px * 14);
}
.slider .slide {
height: 100px;
width: 200px;
}