4 .block { width:100px; height:100px; margin:2em 1em; background-color:green }
7 <div style="border:2px solid black">
8 <div style="-webkit-writing-mode:vertical-lr" class="block"></div>
9 <div style="-webkit-writing-mode:vertical-rl" class="block"></div>
10 <div style="-webkit-writing-mode:horizontal-bt" class="block"></div>
11 <div class="block"></div>