article {
  width: 400px;
  height: 400px;
  display: grid;
  grid-template-rows: repeat(2, 1fr);
  grid-template-columns: repeat(2, 1fr);
  border: solid 5px silver;
  grid-auto-flow: column;
}

div {
  background: blueviolet;
  background-clip: content-box;
  padding: 10px;
  font-size: 35px;
  color: white;
}