CODE EXAMPLE FOR CSS

css grid

<div class="grid-container">
  <div class="grid-item">1</div>
  <div class="grid-item">2</div>
  <div class="grid-item">3</div>  
  <div class="grid-item">4</div>
  <div class="grid-item">5</div>
  <div class="grid-item">6</div>  
  <div class="grid-item">7</div>
  <div class="grid-item">8</div>
  <div class="grid-item">9</div>
</div>

.grid-container {
  width: 300px;
  height: 300px;
  display: grid;
  grid-template-columns: auto auto auto;
  place-items: center;
}

.grid-item {
  background-color: silver;
  width: 50px;
  height: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
}