anim.css

#anim-1, #anim-2 {
    position: fixed;
    background: linear-gradient(135deg, rgba(0, 83, 116, 1) 0%, rgba(2, 86, 121, 1) 13.05%, rgba(9, 96, 136, 1) 28.68%, rgba(19, 112, 160, 1) 45.62%, rgba(34, 135, 193, 1) 63.38%, rgba(37, 140, 201, 1) 67%);
    height: 250px;
    width: 80px;
    border-radius: 40px;
    top: 0;
    right: 200px;
    padding: 0;
}

#anim-1 {
    z-index: -20;
    opacity: .1;
    transform: rotate(45deg);
    animation: anim-1 2s cubic-bezier(0, 0, 0.41, 0.97);
}

#anim-2 {
    z-index: -21;
    opacity: .1;
    transform: rotate(-45deg) translateY(85px) translateX(-85px);
    animation: anim-2 2s cubic-bezier(0, 0, 0.41, 0.97);
}

@keyframes anim-1 {
    0% {
        transform: rotate(10deg);
        top: 100vh;
        right: 100vh;
    }
    100% {
        /* top: 0; */
        /* right: 0; */
        
    }
}

@keyframes anim-2 {
    0% {
        transform: rotate(100deg);
        top: -100vh;
        right: 100vh;
    }
    100% {
        /* top: 0; */
        /* right: 0; */
    }
}