html,body{margin:0;padding:0;height:100%}.contained{width:2px;height:1px}.itema{grid-column-start:1;grid-column-end:2;background-color:#dcdcdc}.itemb{grid-column-start:2;grid-column-end:3;background-color:#639}.itemc{grid-column-start:3;grid-column-end:4;background-color:#9acd32}.itemd{grid-column-start:4;background-color:orange}