*{
    margin: 0;
    padding: 0;
}
body{
    background-color: black;
}
.bar{
    width: 100%;
    height: 4px;
}
.juice{
    width: 100%;
    height: 4px;
    background: linear-gradient(140deg,rgb(255, 0, 0),green,yellow);
    animation: animate 4s linear infinite;
}
@keyframes animate{
    100%
    {
        filter: hue-rotate(360deg);
    }
}