Make fading out using css3

I will teach easy tutorial how to make your page / blog fading out using css3.
First step type on your css :

@-webkit-keyframes FadingOut { 0% { opacity:0; } 100% {opacity:1; } }
@-moz-keyframes FadingOut { 0% { opacity:0; filter: alpha(opacity=0);} 100% {opacity:1; filter: alpha(opacity=100); } }
@-o-keyframes FadingOut { 0% { opacity:0; } 100% {opacity:1; } }
@keyframes FadingOut { 0% { opacity:0; filter: alpha(opacity=0);} 100% {opacity:1; filter: alpha(opacity=100); } }

and add html css like :

html { -webkit-animation: FadingOut 2s; -moz-animation: FadingOut 2s; -ms-animation: FadingOut 2s;}

Example click here