_animation.scss

@mixin animation($value) {
  -webkit-animation: unquote($value);
     -moz-animation: unquote($value);
       -o-animation: unquote($value);
          animation: unquote($value);
}

@mixin animation-property($property, $value) {
  -webkit-animation-#{$property}: unquote($value);
     -moz-animation-#{$property}: unquote($value);
       -o-animation-#{$property}: unquote($value);
          animation-#{$property}: unquote($value);
}

@mixin keyframes($name) {
  @-webkit-keyframes #{$name} { @content; }
     @-moz-keyframes #{$name} { @content; }
       @-o-keyframes #{$name} { @content; }
          @keyframes #{$name} { @content; }
}