@keyframes move_wave {
    0% {
        transform: translateX(0) translateZ(0) scaleY(1)
    }
    50% {
        transform: translateX(-25%) translateZ(0) scaleY(0.55)
    }
    100% {
        transform: translateX(-50%) translateZ(0) scaleY(1)
    }
} 

.waveWrapper {
    overflow: hidden;
    z-index: -10;
    position: absolute;
    left: 50%;
    width: 100%;
    margin-left: -50%;
    height: 100%;
    top: -1px;
}
.waveWrapperInner {
    position: absolute;
    width: 100%;
    overflow: hidden;
    height: 100%;
    bottom: -1px;
}

/** По времени года */
.winter {
    background-image: linear-gradient(to top, #37d5d6 20%, #36096d 80%);
}
.spring {
    background-image: linear-gradient(to top, #eec0c6 20%, #ffa9a9 80%);
}
.summer {
    background-image: linear-gradient(to top, #20bf55 20%, #0f4e12 80%);
}
.autumn {
    background-image: linear-gradient(to top, #f5d020 20%, #ff8461 80%);
}


.bgTop {
    z-index: 15;
    opacity: 0.5;
}
.bgMiddle {
    z-index: 10;
    opacity: 0.75;
}
.bgBottom {
    z-index: 5;
}
.wave {
    position: absolute;
    left: 0;
    width: 200%;
    height: 100%;
    background-repeat: repeat no-repeat;
    background-position: 0 bottom;
    transform-origin: center bottom;
}

.waveTop {
    background-size: 50% 100px;
    background-image: url("https://dm.m1w.ru/assets/img/wave-top.png");
}
.waveMiddle {
    background-size: 50% 120px;
    background-image: url("https://dm.m1w.ru/assets/img/wave-mid.png");
}
.waveBottom {
    background-size: 50% 100px;
    background-image: url("https://dm.m1w.ru/assets/img/wave-bot.png");
}

.waveAnimation .waveTop {
    animation: move_wave 30s linear infinite;
    animation-delay: 1s;
}
.waveAnimation .waveMiddle {
    animation: move_wave 60s linear infinite;
    animation-delay: 2s;
}
.waveAnimation .waveBottom {
    animation: move_wave 120s linear infinite;
    animation-delay: 3s;
}