`box`: Generate a 3D box from the input text.

    **Usage:** `box message`

    If you don't give this command a message, it will find the most recently
    sent message and process it instead.

    **Example:**
        >>> `box Apple`
        ```
            elppA
           l   pp
          p   p p
         p   l  l
        Apple   e
        p   l  l
        p   p p
        l   pp
        elppA
        ```