<div class="arrow"></div>
.arrow {
     position: relative;
     content: '';
     width: 30px;
     height: 30px;
     background: #d01137;
     border-radius: 50%;
}
.arrow::after {
     position: absolute;
     content: '';
     width: 8px;
     height: 8px;
     border-top: solid 1px #fff;
     border-right: solid 1px #fff;
     -webkit-transform: rotate(45deg);
     transform: rotate(45deg);
     top: 50%;
     left: 8px;
     margin-top: -4px;
}

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External JavaScript

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