Сергей Зенькович

<div class="mainB">
          <div class="main"></div>
          <div class="main"></div>
          <div class="main"></div>
          <div class="main"></div>
          <div class="main"></div>
          <div class="main"></div>
		  <div class="main"></div>
      </div>

.mainB{
	display: grid;
	grid-template-columns: repeat(8, 2fr);
	grid-template-rows: 2fr 2fr;
	grid-template-areas:
	"a a b b c c d d"
	". e e f f g g .";
	grid-gap: 10px;
	background-color: #999;
	width: 100%;
	height: 100vh;
}

.main{
	background-color: red;
}

.main:nth-of-type(1){
	grid-area: a;
}

.main:nth-of-type(2){
	grid-area: b;
}

.main:nth-of-type(3){
	grid-area: c;
}

.main:nth-of-type(4){
	grid-area: d;
}

.main:nth-of-type(5){
	grid-area: e;
}

.main:nth-of-type(6){
	grid-area: f;
}

.main:nth-of-type(7){
	grid-area: g;
}