@keyframes foo { /* ... */ }
@keyframes "foo" { /* ... */ }
@keyframes    foo    { /* ... */ }

@keyframes slidein {
    from {
        transform: translateX(0%);
    }

    to {
        transform: translateX(100%);
    }
}

@keyframes identifier {
    0% { top: 0; left: 0; }
    30% { top: 50px; }
    68%, 72% { left: 50px; }
    100% { top: 100px; left: 100%; }
}