.parent{display:grid;grid-template-columns:1fr;grid-template-rows:1fr;grid-column-gap:0;grid-row-gap:0}.div1,.div2{grid-area:1/1/2/2}.div2:hover{animation:fade .7s 40ms infinite alternate both}@keyframes fade{0%{opacity:1}25%{opacity:1}75%{opacity:0s}to{opacity:0}}.parentGrid{display:grid;grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(2,1fr);grid-column-gap:0;grid-row-gap:0}.div1Grid{grid-area:1/1/2/2}.div2Grid{grid-area:1/2/2/3}.div3Grid{grid-area:2/1/3/2}.div4Grid{grid-area:2/2/3/3}