HTMLify

body {
    background-color: #333;
}

.wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 100%;
    height: 23rem;
    background-color: #333;
    overflow: hidden;
}

.wrapper::before {
    background-color: #fff;
    content: "";
    position: absolute;
    border-radius: 1rem;
    height: 0.15rem;
    left: 2rem;
    right: 2rem;
    bottom: 2rem;
}

.wrapper .ball {
    background-color: #fff;
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    position: absolute;
    animation: ballMovement 1.6s cubic-bezier(0, 0.98, 1, 0.99) infinite;
    bottom: 2.1rem;
    transform: translate(14rem, -15rem) scale(1.2, 0.5);
    transform-origin: bottom;
}

@keyframes ballMovement {
    0% {
        transform: translate(14rem, -15rem);
    }

    15% {
        transform: translate(7rem, 0rem) scale(1.2, 0.5);
    }

    30% {
        transform: translate(2rem, -10rem) scale(1, 1);
    }

    45% {
        transform: translate(-2rem, 0rem) scale(1.2, 0.8);
    }

    60% {
        transform: translate(-5rem, -5.5rem) scale(1, 1);
    }

    75% {
        transform: translate(-8rem, 0rem) scale(1.1, 0.9);
    }

    100% {
        transform: translate(-14rem, -3rem) scale(1, 1);
    }
}