body{
    display: grid;
    grid-gap: 20px;
    grid-template-columns: 400px 400px 400px 400px 400px;
    grid-template-rows: 400px 1fr 1fr 600px 600px;
}

main{
    background-color: blue;
    position: relative;
    grid-column: 2 / 4 ;
    grid-rows: 2 / 4;
}
nav{
  grid-column: 1 / 2;
  grid-rows: 1 / 2;
  background-color: blue;
}
.kiwi{
    background-color: blue;
    position: absolute;
    grid-column: 3 / 4 ;
    grid-rows: 3 / 4;
    z-index: 100;
  }