@keyframes foo { from {} from {}}

@keyframes foo { from {} FROM {}}

@keyframes foo { 0% {} 0% {}}

@keyframes foo { from {} to {} to {} }

@keyframes foo { 0% {} 0% {} 100% {} }

@-webkit-keyframes foo { 0% {} 0% {} 100% {} }

@-moz-keyframes foo { 0% {} 0% {} 100% {} }