This part Grids are use for mobile device
To build a two-column (50/50%) layout.
To build a two-column (50/50%) layout(button).
To build a three-column grids (33/33/33%) layout.
To build a Three-column grids (33/33/33%) layout(button).
To build a Four-column grids (25/25/25/25%) layout.
To build a Four-column grids (25/25/25/25%) layout(button).
To build a Five-column grids (20/20/20/20/20%) layout.
To build a Five-column grids (20/20/20/20/20%) layout(button).