@keyframes billspin {
    0% {
        rotate: 0deg;
        background-color: transparent;
        box-shadow: none;
    }

    100% {
        rotate: 360deg;
        background-color: transparent;
        box-shadow: none;
    }
}
@keyframes billspinreturn {
    100% {
        rotate: 0deg;
    
    }

}
#bill {
    background-image: url("/assets/icons/projects/bill-normal.png");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    outline: none;
    rotate: 0deg;
}

#bill:hover {
    background-image: url("/assets/icons/projects/bill-pickup.png");
    animation: billspin 0.5s infinite linear;
}