.jspinner
{
    width: 100%;
    height: 6px;

    /*
    
    position: fixed;
    z-index: 10000;

    */

    /*background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);*/
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #d5c623, #c023d5, #d5c623, #e73c7e, #ee7752);
    background-size: auto;
    background-size: 400% 400%;

    animation: jspinner-gradient 5s linear infinite;
}

@keyframes jspinner-gradient
{
    0%
    {
        background-position: 0% 50%;
    }
    100%
    {
        background-position: 100% 50%;
    }
}