Container
Row
Span 12
Row
Span 6
Span 6
Row
Span 3
Span 3
Span 3
Span 3
Row
Span 2
Span 2
Span 2
Span 2
Span 2
Span 2
Row
Span 1
Span 1
Span 1
Span 1
Span 1
Span 1
Span 1
Span 1
Span 1
Span 1
Span 1
Span 1