// keyframes mixin
=keyframes($name)
  @-webkit-keyframes #{$name}
    @content
  @-moz-keyframes #{$name}
    @content
  @-ms-keyframes #{$name}
    @content
  @keyframes #{$name}
    @content

// use of keyframes mixin
+keyframes(bgcolor)
  0%
    background-color: #ffccf2
  50%
    background-color: #ccffcc
  100%
    background-color: #ccffff