fade in and out

-webkit-transition: background 300ms ease-in 200ms;
-moz-transition: background 300ms ease-in 200ms;
-o-transition: background 300ms ease-in 200ms;
-webkit-transition: color 300ms ease-in 200ms;
-moz-transition: color 300ms ease-in 200ms;
-o-transition: color 300ms ease-in 200ms;