====== This is the PlayGround ======

*[[.:celestina_639:]]

The "red" simply means that the link goes to a page which does (not yet) exist.

The "*" shows because it's a regular character--you probably wanted to precede it by two spaces like "  *" so that it's a list item:

  *[[.:celestina_639:]]

Once a page is created, the link will turn green and get its name from the first heading on the page. For instance, here's a link to this very page:

  *[[.:playground]]