SQL & PL/SQL

I am just learning Stored Procedures. I have Oracle SQL Developer Version 1.5.1 loaded, going against 11G running on Ubuntu Linux.

I try to build a very basic Stored Procedure:

CREATE OR REPLACE
PROCEDURE HR.TEST AS
BEGIN
Select * from hr.jobs
NULL;
END HR.TEST;

I always receive the following error:
Source does not have a runnable target

I always post these question in the wrong area on this Forum, so go ahead and just direct me to the correct forum if applicable.

Any ideas?

Thanks Zach