#alphabetStack {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.alphabet-row {
    overflow: hidden;
    white-space: nowrap;
    font-size: 20px;
    font-family: monospace;
}

.animate-to-right {
    display: inline-block;
    animation: to-the-right 15s linear alternate infinite;
}

.animate-to-left {
    display: inline-block;
    animation: to-the-left 15s linear alternate infinite;
}

@keyframes to-the-right {
    0% {
        transform: translateX(-45%);
    }
    100% {
        transform: translateX(0);
    }
}

@keyframes to-the-left {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-45%);
    }
}