title: Wrap element to new line/row using flexbox
body: <p>I have trouble forcing an item into the next row in a flexbox layout.</p>
  
  <p>How can I do something like the following image?</p>
  
  <p><a href="https://i.stack.imgur.com/cLFBX.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/cLFBX.jpg" alt="enter image description here"></a></p>
  
  <p>This is what I got so far:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>#wrap {
    display: flex;
    width: 86vw;
    height: auto;
    box-sizing: border-box;
    margin: 0 auto;
  }
  .item1,
  .item2 {
    width: 50%;
    height: 24.5vw;
    background: #4add69;
  }
  .item1 {
    margin-right: 10px;
  }
  .item2 {
    margin-left: 10px;
  }
  .item3 {
    width: 60%;
    height: 40vw;
    background: #d56c6c;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="wrap"&gt;
    &lt;div class="item1"&gt;&lt;/div&gt;
    &lt;div class="item2"&gt;&lt;/div&gt;
    &lt;div class="item3"&gt;&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>