body{
margin:0;
padding:0;
}
.animate-gradient {
    background-size: 400% 400%;
    animation: gradientMove 12s ease infinite;
}

@keyframes gradientMove {

    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }

}