<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Flexbox</title>
  </head>
<body>
   <div class="container">
    <div class="item" id="one">1</div>
    <div class="item" id="two">2</div>
    <div class="item" id="flex">3</div>
   </div>
  <br>
  <div class="container2">
    <div class="item" id="one">1</div>
    <div class="item" id="two">2</div>
    <div class="item" id="flex">3</div>
   </div>
  
  
  <br>
  <div class="container3">
    <div class="item" id="one">1</div>
    <div class="item" id="two">2</div>
    <div class="item" id="flex">3</div>
   </div>
  
  <br>
  <div class="container4">
    <div class="item" id="one">1</div>
    <div class="item" id="two">2</div>
    <div class="item" id="flex">3</div>
   </div> 
</body>
</html>
.container{
          display: flex;
          height: 70px;
          border: 1px solid #808080;
          flex-direction: row;
           }

.container2{
          display: flex;
          height: 70px;
          border: 1px solid #808080;
          flex-direction: row-reverse;
           }

.container3{
          display: flex;
          height: 150px;
          border: 1px solid #808080;
          flex-direction: column;
           }

.container4{
          display: flex;
          height: 150px;
          border: 1px solid #808080;
          flex-direction: column-reverse;
           }

.item{
      border: 1px solid #1d1d1d;
      background-color: #23C4ED;
      width: 50px;
      height: 50px;
      margin: 7px;
     }

External CSS

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External JavaScript

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