CSS Gradient Animation

my.css

background: linear-gradient(207deg, #10ec6f, #172de1);
background-size: 400% 400%;
-webkit-animation: test 6s ease infinite;
-moz-animation: test 6s ease infinite;
-o-animation: test 6s ease infinite;
animation: test 6s ease infinite;
@-webkit-keyframes test {
    0%{background-position:58% 0%}
    50%{background-position:43% 100%}
    100%{background-position:58% 0%}
}
@-moz-keyframes test {
    0%{background-position:58% 0%}
    50%{background-position:43% 100%}
    100%{background-position:58% 0%}
}
@-o-keyframes test {
    0%{background-position:58% 0%}
    50%{background-position:43% 100%}
    100%{background-position:58% 0%}
}
@keyframes test {
    0%{background-position:58% 0%}
    50%{background-position:43% 100%}
    100%{background-position:58% 0%}
}