CSS Gradient Animation

my.css

background: linear-gradient(265deg, #5f06f3, #f2153a);
background-size: 400% 400%;
-webkit-animation: CloudHappy 30s ease infinite;
-moz-animation: CloudHappy 30s ease infinite;
-o-animation: CloudHappy 30s ease infinite;
animation: CloudHappy 30s ease infinite;
@-webkit-keyframes CloudHappy {
    0%{background-position:0% 54%}
    50%{background-position:100% 47%}
    100%{background-position:0% 54%}
}
@-moz-keyframes CloudHappy {
    0%{background-position:0% 54%}
    50%{background-position:100% 47%}
    100%{background-position:0% 54%}
}
@-o-keyframes CloudHappy {
    0%{background-position:0% 54%}
    50%{background-position:100% 47%}
    100%{background-position:0% 54%}
}
@keyframes CloudHappy {
    0%{background-position:0% 54%}
    50%{background-position:100% 47%}
    100%{background-position:0% 54%}
}