JSFiddle - React, Tailwind, and code Playground

HTML

<div class="glow"></div>

CSS

.glow {
    width: 85px;
    height: 240px;
    top: -20px;
    opacity: 0.2;
    position: relative;
    background-image: url("http://i.cubeupload.com/7EYfla.png");
    
    -webkit-animation: play 3s infinite;
       -moz-animation: play 3s infinite;
        -ms-animation: play 3s infinite;
         -o-animation: play 3s infinite;
            animation: play 3s infinite;
}

@-webkit-keyframes play {
    0% { opacity: 0.2; }
    50% { opacity: 0.4; }
    100% { opacity: 0.2 }
}

@-moz-keyframes play {
    0% { opacity: 0.2; }
    50% { opacity: 0.4; }
    100% { opacity: 0.2 }
}

@-ms-keyframes play {
    0% { opacity: 0.2; }
    50% { opacity: 0.4; }
    100% { opacity: 0.2 }
}

@-o-keyframes play {
    0% { opacity: 0.2; }
    50% { opacity: 0.4; }
    100% { opacity: 0.2 }
}

@keyframes play {
    0% { opacity: 0.2; }
    50% { opacity: 0.4; }
    100% { opacity: 0.2 }
}