Demo: CSS gap

<div class='container'>
  <div class='item'>Item 1</div>
  <div class='item'>Item 2</div>
  <div class='item'>Item 3</div>
  <div class='item'>Item 4</div>
</div>

.container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding: 20px;
  background-color: #f0f0f0;
}

.item {
  background-color: #4CAF50;
  color: white;
  padding: 20px;
  text-align: center;
  border-radius: 5px;
}

// No JavaScript required for this demo