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