Thus far, we've been working with a "temporary script". If you want to make it a permanent part of the object, choose "name and save this script", and give it a name, such as "wander".
As soon as you've done this, you'll see "wander" show up in the star's Viewer, alongside "forward by", "turn by", "make sound", etc.
Your "wander" script has now become a formal part of the object - you've added a method to your object. It can now be deployed in viewers and scriptors just like the system-defined scripts such as "forward by". And it can be called by any other script.
