@keyframes VOLUME_LARGE_WAVE_FLASH { 0% { opacity: 0; }
33% { opacity: 1; } 66% { opacity: 1; }
100% { opacity: 0; } }

.volume__small-wave {
animation: VOLUME_SMALL_WAVE_FLASH 2s infinite; opacity: 0;
}

.volume__large-wave { animation: VOLUME_LARGE_WAVE_FLASH 2s infinite .3s;
opacity: 0; }