animation-direction

Animation Direction in CSS3

What is animation-direction? The animation-direction property specifies whether or not the animation should play in reverse direction or in alternate cycles. If the animation-direction value is "alternate", the animation played as normal every odd time (1,3,5,etc...) and backwards every even time (2,3,6,etc...). Note: If the animation is set to play only once, this property will have no effect