* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    width: 100vw;
    background: #FFF;
    /*display: flex;*/
    align-items: center;
    justify-content: center;
}

.tank {
    position: relative;
    width: 200px;
    height: 200px;
    border: 3px solid #17a2b8;
    border-radius: 30%;
    overflow: hidden;
    margin: auto auto 24px auto;
}

.wave {
    position: absolute;
    width: 400px;
  height: 400px;
    background: url("wave1.png") repeat-x;
    background-size: 400px 200px;
    animation: waveMove 5s linear infinite;
    opacity: 0.6;
    transition: transform 1.5s ease-in-out;
}

#wave2, #wave2CH01, #wave2CM01, #wave2BC01, #wave2NL01 {
    animation-duration: 6s;
    opacity: 0.5;
}

.counter {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
    font-weight: bold;
}

#capCent {margin-top: -6px; }

@keyframes waveMove {
    0% { background-position: -400px 0; }
    100% { background-position: 0px 0; }
}