a post with custom blockquotes

> ##### TIP
>
> A tip can be used when you want to give advice
> related to a certain content.
{: .block-tip }

> ##### WARNING
>
> This is a warning, and thus should
> be used when you want to warn the user
{: .block-warning }

> ##### DANGER
>
> This is a danger zone, and thus should
> be used carefully
{: .block-danger }