JSFiddle - React, Tailwind, and code Playground

HTML

<div id="train"></div>

CSS

#train { width: 110px; height: 43px; border: 10px solid #454545; background: url(http://i.imgur.com/6uOoK.png) 110px 0; -webkit-animation: train 2s step-end 0s infinite normal; }

@-webkit-keyframes train {
    0%{background-position: 110px 0;}
    2%{background-position: 0px 0;}
    4%{background-position: -110px 0;}
    6%{background-position: -220px 0;}
    8%{background-position: -330px 0;}
    10%{background-position: -440px 0;}
    12%{background-position: -550px 0;}
    14%{background-position: -660px 0;}
    16%{background-position: -770px 0;}
    18%{background-position: -880px 0;}
    20%{background-position: -990px 0;}
    22%{background-position: -1100px 0;}
    24%{background-position: -1210px 0;}
    26%{background-position: -1320px 0;}
    28%{background-position: -1430px 0;}
    30%{background-position: -1540px 0;}
    32%{background-position: -1650px 0;}
    34%{background-position: -1760px 0;}
    36%{background-position: -1870px 0;}
    38%{background-position: -1980px 0;}
    40%{background-position: -2090px 0;}
    42%{background-position: -2200px 0;}
    44%{background-position: -2310px 0;}
    46%{background-position: -2420px 0;}
    48%{background-position: -2530px 0;}
}