http://www.w3.org/TR/css3-background/#the-background-repeat
[.s01 .tl]
[.s01]
[.s02 .tl]
[.s02]
[.s03 .tl]
[.s03]
[.s04 .tl]
[.s04]
[.s05 .tl]
[.s05]
[.s06 .tl]
[.s06]
[.s07 .tl]
[.s07]
[.s08 .tl]
[.s08]
[.s09 .tl]
[.s09]