Directly from a book called the Drum Bible is an essential practicing technique called stick control which is the foundation of all good, confident and relaxed drummers.
This practicing tool generates infinitely what used to be written on paper: many, many different combinations of sticking so drummers could practice being comfortable in any situation.
There are many methods of stick control which you can use to develop away from the simple 16th note right left pattern on the app. Explore away!