@-webkit-keyframes spinning {
  to {
    @include transform(rotate(-360deg));
  }
}

@-moz-keyframes spinning {
  to {
    @include transform(rotate(-360deg));
  }
}

@-ms-keyframes spinning {
  to {
    @include transform(rotate(-360deg));
  }
}

@-o-keyframes spinning {
  to {
    @include transform(rotate(-360deg));
  }
}

@keyframes spinning {
  to {
    @include transform(rotate(-360deg));
  }
}

@mixin spin($delay) {
  -webkit-animation: spinning $delay linear infinite;
  -moz-animation: spinning $delay linear infinite;
  -ms-animation: spinning $delay linear infinite;
  -o-animation: spinning  $delay linear infinite;
  animation: spinning $delay linear infinite;
}