.italy{
    position: relative; 
    width: 18ex; 
    height: 12ex;
    border: 1px solid black;
}
.italy :first-child{
    position: absolute; 
    left: 0; 
    top: 0; 
    width: 6ex; 
    height: 12ex;
    background: green;
}
.italy div+div+div{
    position: relative; 
    left: 12ex; 
    top: 0; 
    width: 6ex; 
    height: 12ex;
    background: red;
  }