.audio-btn {
    position:fixed;
    width: 32px;
    height: 32px;
    top:20px;
    right:13px;
    background-image: url(../music.png);
    background-size: contain;
    z-index: 9999;
}
.rotate {
    -webkit-animation: rotating 1.8s linear infinite;
    -moz-animation: rotating 1.8s linear infinite;
    -o-animation: rotating 1.8s linear infinite;
    animation: rotating 1.8s linear infinite
}

@-webkit-keyframes rotating {
    from { -webkit-transform: rotate(0) }
    to { -webkit-transform: rotate(360deg) }
}

@keyframes rotating {
    from { transform: rotate(0) }
    to { transform: rotate(360deg) }
}
@-moz-keyframes rotating {
    from { -moz-transform: rotate(0) }
    to { -moz-transform: rotate(360deg) }
}