pre#transition1 { background-color: #ff0000; -o-transition-property: background-color; -o-transition-duration: 2s; }
pre#transition1 {
background-color: #ff0000;
-o-transition-property: background-color;
-o-transition-duration: 2s;
}
pre#transition1:hover { background-color: #ffffff; }
pre#transition1:hover {
background-color: #ffffff;