07/02/grid-line.html

.grid-container{
  display:grid;
  grid-template-columns:100px 100px 100px;
  grid-template-rows:100px 100px 100px;
}
.grid-item:nth-child(1){
  grid-column-start:1;
  grid-column-end:3;
}
.grid-item:nth-child(2){
  grid-column-start:3;
  grid-column-end:4;
}
.grid-item:nth-child(3){
  grid-row-start:2;
  grid-row-end:4;
}
.grid-item:nth-child(4){
  grid-column-start:2;
  grid-column-end:4;
  grid-row-start:2;
  grid-row-end:4;
}