#grid-container {
  display: grid;
  grid-template-columns: 150px 150px 150px 150px;
  grid-auto-rows: 150px;
}
#grid-container div {
  width: 60px;
  height: 60px;
  padding: 10px;
  background: #CCCCCC;
}
#box-2 {
  align-self: end;
}