Do you have anything in terms of code yet? It would be very helpful to post what you have so far, we could then point you in the right direction.
Note: I couldn't write the diamond here appropriately somehow
Try putting it in output tags:
(Know that the actual format is lost in the first example and it is to just serve as an example of how to use the tags):
[output]
*
* *
* *
* *
*[/output]