html, body {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
}

.container2 {
    --duration: 1.5s;
    --container-size: 250px;
    --box-size: 33px;
    --box-border-radius: 15%;
    width: var(--container-size);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.container2 .📦 {
    width: var(--box-size);
    height: var(--box-size);
    position: relative;
    display: block;
    transform-origin: -50% center;
    border-radius: var(--box-border-radius);
}

.container2 .📦:after {
    content: '';
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    right: 0;
    background-color: lightblue;
    border-radius: var(--box-border-radius);
    box-shadow: 0px 0px 10px 0px rgba(28, 159, 255, 0.4);
}

.container2  .📦:nth-child(1) {
    animation: slide var(--duration) ease-in-out infinite alternate;
}

.container2  .📦:nth-child(1):after {
    animation: color-change var(--duration) ease-in-out infinite alternate;
}

.container2   .📦:nth-child(2) {
    animation: flip-1 var(--duration) ease-in-out infinite alternate;
}

.container2  .📦:nth-child(2):after {
    animation: squidge-1 var(--duration) ease-in-out infinite alternate;
}

.container2 .📦:nth-child(3) {
    animation: flip-2 var(--duration) ease-in-out infinite alternate;
}

.container2  .📦:nth-child(3):after {
    animation: squidge-2 var(--duration) ease-in-out infinite alternate;
}

.container2  .📦:nth-child(4) {
    animation: flip-3 var(--duration) ease-in-out infinite alternate;
}

.container2  .📦:nth-child(4):after {
    animation: squidge-3 var(--duration) ease-in-out infinite alternate;
}

.container2    .📦:nth-child(5) {
    animation: flip-4 var(--duration) ease-in-out infinite alternate;
}

.container2   .📦:nth-child(5):after {
    animation: squidge-4 var(--duration) ease-in-out infinite alternate;
}

.container2   .📦:nth-child(2):after {
    background-color: #1C9FFF;
}

.container2    .📦:nth-child(3):after {
    background-color: #1FB1FD;
}

.container2  .📦:nth-child(4):after {
    background-color: #22C7FB;
}

.container2   .📦:nth-child(5):after {
    background-color: #23D3FB;
}

@keyframes slide {
    0% {
        background-color: #1795FF;
        transform: translatex(0vw);
    }

    100% {
        background-color: #23D3FB;
        transform: translatex(calc(var(--container-size) - (var(--box-size) * 1.25)));
    }
}

@keyframes color-change {
    0% {
        background-color: #1795FF;
    }

    100% {
        background-color: #23D3FB;
    }
}

@keyframes flip-1 {
    0%, 15% {
        transform: rotate(0);
    }

    35%, 100% {
        transform: rotate(-180deg);
    }
}

@keyframes squidge-1 {
    5% {
        transform-origin: center bottom;
        transform: scalex(1) scaley(1);
    }

    15% {
        transform-origin: center bottom;
        transform: scalex(1.3) scaley(0.7);
    }

    25%, 20% {
        transform-origin: center bottom;
        transform: scalex(0.8) scaley(1.4);
    }

    55%, 100% {
        transform-origin: center top;
        transform: scalex(1) scaley(1);
    }

    40% {
        transform-origin: center top;
        transform: scalex(1.3) scaley(0.7);
    }
}

@keyframes flip-2 {
    0%, 30% {
        transform: rotate(0);
    }

    50%, 100% {
        transform: rotate(-180deg);
    }
}

@keyframes squidge-2 {
    20% {
        transform-origin: center bottom;
        transform: scalex(1) scaley(1);
    }

    30% {
        transform-origin: center bottom;
        transform: scalex(1.3) scaley(0.7);
    }

    40%, 35% {
        transform-origin: center bottom;
        transform: scalex(0.8) scaley(1.4);
    }

    70%, 100% {
        transform-origin: center top;
        transform: scalex(1) scaley(1);
    }

    55% {
        transform-origin: center top;
        transform: scalex(1.3) scaley(0.7);
    }
}

@keyframes flip-3 {
    0%, 45% {
        transform: rotate(0);
    }

    65%, 100% {
        transform: rotate(-180deg);
    }
}

@keyframes squidge-3 {
    35% {
        transform-origin: center bottom;
        transform: scalex(1) scaley(1);
    }

    45% {
        transform-origin: center bottom;
        transform: scalex(1.3) scaley(0.7);
    }

    55%, 50% {
        transform-origin: center bottom;
        transform: scalex(0.8) scaley(1.4);
    }

    85%, 100% {
        transform-origin: center top;
        transform: scalex(1) scaley(1);
    }

    70% {
        transform-origin: center top;
        transform: scalex(1.3) scaley(0.7);
    }
}

@keyframes flip-4 {
    0%, 60% {
        transform: rotate(0);
    }

    80%, 100% {
        transform: rotate(-180deg);
    }
}

@keyframes squidge-4 {
    50% {
        transform-origin: center bottom;
        transform: scalex(1) scaley(1);
    }

    60% {
        transform-origin: center bottom;
        transform: scalex(1.3) scaley(0.7);
    }

    70%, 65% {
        transform-origin: center bottom;
        transform: scalex(0.8) scaley(1.4);
    }

    100%, 100% {
        transform-origin: center top;
        transform: scalex(1) scaley(1);
    }

    85% {
        transform-origin: center top;
        transform: scalex(1.3) scaley(0.7);
    }
}