@mixin keyframes($name)
  @if $experimental-support-for-webkit
    @-webkit-keyframes #{$name}
      @content
  @if $experimental-support-for-mozilla
    @-moz-keyframes #{$name}
      @content
  @if $experimental-support-for-opera
    @-o-keyframes #{$name}
      @content
  @if $experimental-support-for-microsoft
    @-ms-keyframes #{$name}
      @content
  @keyframes #{$name}
    @content