Pattern Loops
Finally, there are also Pattern Loops in the Loop Browser, as you can see in the filtering options:
As with any Apple Loop, you can simply drag it into the Workspace below the other tracks to create a region. Now you can open the Step Sequencer and edit away to make it your own.
This thing is deep! Now that you have a basic understanding, you may well want to return to the included Logic Pro Tutorial project to further explore the new Step Sequencer.