Basic Layout

col-12
col-12
col-8 offset-4
col-8
col-4 offset-8
col-4
col-4 offset-20

Media Query

col-xs-24 col-sm-16 col-md-12 col-lg-8 offset-xs-0 offset-sm-4 offset-md-6 offset-lg-8
col-8 push-8
col-8 offset-8 pull-8
row justify-content-flex-start align-item-flex-start
row justify-content-center align-item-center
row middle show-grid
row justify-content-flex-end align-item-flex-end