CSS Gradient Animation

my.css

background: linear-gradient(147deg, #336699, #dde71d);
background-size: 400% 400%;
-webkit-animation: AnimationRolograafBackground 3s ease infinite;
-moz-animation: AnimationRolograafBackground 3s ease infinite;
-o-animation: AnimationRolograafBackground 3s ease infinite;
animation: AnimationRolograafBackground 3s ease infinite;
@-webkit-keyframes AnimationRolograafBackground {
    0%{background-position:0% 5%}
    50%{background-position:100% 96%}
    100%{background-position:0% 5%}
}
@-moz-keyframes AnimationRolograafBackground {
    0%{background-position:0% 5%}
    50%{background-position:100% 96%}
    100%{background-position:0% 5%}
}
@-o-keyframes AnimationRolograafBackground {
    0%{background-position:0% 5%}
    50%{background-position:100% 96%}
    100%{background-position:0% 5%}
}
@keyframes AnimationRolograafBackground {
    0%{background-position:0% 5%}
    50%{background-position:100% 96%}
    100%{background-position:0% 5%}
}