title: How do I make a flowchart using markdown on my github blog
body: <p>I recently put some posts on my github jekyll blog.Everything is fine,except my flowchart.I used to make flowchart like this:</p>
  
  <pre><code>```flow
  my content
  ```
  </code></pre>
  
  <p>but when I preview the post,It can't display as a flowchart.
  This is Ok in some other markdown editor.If I want to make flowchart on my github blog,what can I do?Thanks.</p>