Check out example codes for "how to use a blank space with grid template areas css". It will help you in understanding the concepts better.

Code Example 1

.container {
  display: grid;

  grid-template-columns: 2fr 2fr 1fr 2fr;
  grid-template-rows: 100px 200px 100px;

    "head head . side"
    "main main . side"
    "footer footer footer footer";

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