box1
box2
box3
box4
box5
box6
box7
reset grid-column: 1; grid-column: 2; grid-column: 3; grid-column: 4; grid-column: 1 / 3; grid-column: 1 / 4; grid-column: 2 / 3; grid-column: 2 / 4; grid-column: 3 / 4; grid-column: 2 / -1; grid-column: 3 / -1;