Animação de bg css3 degrade

bganimator.css

background: linear-gradient(180deg, #6b1ba6, #a618bd);
background-size: 400% 400%;
-webkit-animation: BgFoliaAnimator 30s ease infinite;
-moz-animation: BgFoliaAnimator 30s ease infinite;
-o-animation: BgFoliaAnimator 30s ease infinite;
animation: BgFoliaAnimator 30s ease infinite;
@-webkit-keyframes BgFoliaAnimator {
    0%{background-position:65% 0%}
    50%{background-position:36% 100%}
    100%{background-position:65% 0%}
}
@-moz-keyframes BgFoliaAnimator {
    0%{background-position:65% 0%}
    50%{background-position:36% 100%}
    100%{background-position:65% 0%}
}
@-o-keyframes BgFoliaAnimator {
    0%{background-position:65% 0%}
    50%{background-position:36% 100%}
    100%{background-position:65% 0%}
}
@keyframes BgFoliaAnimator {
    0%{background-position:65% 0%}
    50%{background-position:36% 100%}
    100%{background-position:65% 0%}
}