<div class="grid">
  <div class="cell"></div>
  <div style="grid-area: 1 / 1 / 2 / 2; background: lightblue; border: 3px dashed deepskyblue;"></div>
  <div style="grid-area: 1 / 2 / 2 / 3; background: lightblue; border: 3px dashed deepskyblue;"></div>
  <div style="grid-area: 1 / 3 / 2 / 4; background: lightblue; border: 3px dashed deepskyblue;"></div>
  <div style="grid-area: 2 / 1 / 3 / 2; background: lightblue; border: 3px dashed deepskyblue;"></div>
</div>
.grid {
  display: grid;
  grid-template-rows: 100px 50px;
  grid-template-columns: 100px 150px 50px;
  grid-template-areas: 'area-a area-a area-b'
                       'area-c area-d area-d';
}

.cell {
  grid-row: 2 / 3;
  grid-column: 2 / span 2;
  
  background: lightpink;
  border: 3px dashed deeppink;
}

External CSS

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External JavaScript

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