body {
  margin: 20px;
}

.grid {
  display: grid;
  grid-gap:20px;
  /* grid-template-columns: 1fr 1fr 1fr 1fr; */
  /* grid-template-rows: 100px 100px 100px 100px; */
  /* Short record (rows / column) */
  grid-template: 100px 100px 100px 100px/ 1fr 1fr 1fr 1fr;
  grid-template-areas: 
		"a a a b"
		"a a a b"
		"c d d d";
}

.item1 {grid-area: a;}
.item2 {grid-area: b;}
.item3 {grid-area: c;}
.item4 {grid-area: d;}

.box {
  background-color: #444;
  color: #fff;
  border-radius: 5px;
  padding: 20px;
  font-size: 150%;
}

.item1 {
  background: #f00;
}
.item2 {
  background: #f0f;
}
.item3 {
  background: #008000;
}
.item4 {
  background: #000;
}