@keyframes animate {
    0%{
        transform: translateY(0) rotate(0deg);
        opacity: 1;
        border-radius: 0;
    }
    100%{
        transform: translateY(-1080px) rotate(720deg);
        opacity: 0;
        border-radius: 50%;
    }
}

.background {
    position: fixed;
    width: 100vw;
    height: 100vh;
    top: 0;
    left: 0;
    margin: 0;
    padding: 0;
    background: linear-gradient(232deg, #8612f7, #d643d3, #ffbe34);
    overflow: hidden;
}
.background li {
    position: absolute;
    display: block;
    list-style: none;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    animation: animate 19s linear infinite;
}




.background li:nth-child(0) {
    left: 43%;
    width: 192px;
    height: 192px;
    bottom: -192px;
    animation-delay: 1s;
}
.background li:nth-child(1) {
    left: 55%;
    width: 173px;
    height: 173px;
    bottom: -173px;
    animation-delay: 2s;
}
.background li:nth-child(2) {
    left: 77%;
    width: 153px;
    height: 153px;
    bottom: -153px;
    animation-delay: 10s;
}
.background li:nth-child(3) {
    left: 83%;
    width: 123px;
    height: 123px;
    bottom: -123px;
    animation-delay: 2s;
}
.background li:nth-child(4) {
    left: 57%;
    width: 125px;
    height: 125px;
    bottom: -125px;
    animation-delay: 11s;
}
.background li:nth-child(5) {
    left: 16%;
    width: 130px;
    height: 130px;
    bottom: -130px;
    animation-delay: 12s;
}
.background li:nth-child(6) {
    left: 33%;
    width: 132px;
    height: 132px;
    bottom: -132px;
    animation-delay: 24s;
}
.background li:nth-child(7) {
    left: 25%;
    width: 188px;
    height: 188px;
    bottom: -188px;
    animation-delay: 23s;
}
.background li:nth-child(8) {
    left: 57%;
    width: 118px;
    height: 118px;
    bottom: -118px;
    animation-delay: 22s;
}
.background li:nth-child(9) {
    left: 69%;
    width: 185px;
    height: 185px;
    bottom: -185px;
    animation-delay: 32s;
}