<!DOCTYPE html>
<html style="width: 100px; height: 100px; border: 3px solid black;">
<body style="-webkit-writing-mode: vertical-rl;"></body>
</html>
<!DOCTYPE html>
<html style="width: 100px; height: 100px; border: 3px solid black;">
<body style="-webkit-writing-mode: vertical-rl;"></body>
</html>