<div class="flex-container space-between" style="width: 100%; justify-content: space-around;">
  <div class="side flex-col flex-container">
    <h1>Ordering items</u></h1>
    
    <h2>order (container direction: row)</h2>
    <div class="flex-container">
      <div style="order: 2">2</div>
      <div style="order: 1">1</div>
      <div style="order: 4">4</div>
      <div style="order: 3">3</div>
    </div>
    
    <h2>order (container direction: column)</h2>
    <div class="flex-col flex-container">
      <div style="order: 2">2</div>
      <div style="order: 1">1</div>
      <div style="order: 4">4</div>
      <div style="order: 3">3</div>
    </div>
  </div>
</div>
.flex-container {
  display: flex;
  margin-bottom: 15px;
}

/* General styles */

.flex-row {
  flex-direction: row;
}

.flex-col {
  flex-direction: column;
}

.side {
  min-width: 250px;
}

.side + .side {
  margin-left: 15px;
}

.side .flex-container {
  background-color: lightblue;
  border: 2px solid #000;
}

.side .flex-container div {
  background-color: lightgreen;
  padding: 10px;
  text-align:center;
  border: 2px solid lightblue;
}

h1, h2 {
  margin-top: 0;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.