<!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>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
  <div>9</div>  
  <div>10</div>
  <div>11</div>
  <div>12</div>  
   </div>
  <br>
  <div class="container2">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
  <div>9</div>  
  <div>10</div>
  <div>11</div>
  <div>12</div>  
   </div>
  
  
  <br>
  <div class="container3">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
  <div>9</div>  
  <div>10</div>
  <div>11</div>
  <div>12</div>  
   </div>
  </body>
</html>
.container{
            display: flex;
            height: 200px;
            border: 1px solid #808080;
            background-color: #46B2E0;
            flex-wrap: wrap;
           }



.container2{
            display: flex;
            height: 100px;
            border: 1px solid #808080;
            background-color: #46B2E0;
            flex-wrap: nowrap;
             
        }

.container3{
            display: flex;
            height: 200px;
            border: 1px solid #808080;
            background-color: #46B2E0;
            flex-wrap: wrap-reverse;
             
        }

.container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}

.container2 > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}

.container3 > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.