html {
    background-color: black;
}

svg {
    margin: 0 auto;
    display: block;
    margin-top: 50px;
}

polygon {
    transform: rotateY(-180deg) scale(0);
    transition: all 0.4s cubic-bezier(0.590, 0.720, 0.375, 1.650);
    transform-origin: center;
}

polygon.processed {
    transform: rotateY(0deg) scale(1);
}