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