CODE EXAMPLE FOR HTML

html div grid 9x9

<div class="grid">
  <div class="cell" style="background-color: green">1</div>
  <div class="cell" style="background-color: red">1</div>
  <div class="cell" style="background-color: blue">1</div>
  <div class="cell" style="background-color: yellow">1</div>
</div>