Sass code to generate 12 grid columns.
@for $i from 1 through 12 {
.col-#{$i} {
grid-column-start: 1;
grid-colimn-end: #{$i};
}
}
@for $i from 1 through 11 {
.push-#{$i} {
grid-column-start: #{$i};
}
}