-------------------------3-4-1-2-------------------------
-----------------1-2-3-4---------------------------------
---------2-3-4-1-----------------------------------------
-1-2-3-4------------------------------------------------- 
The possibilities are endless, you could warmup with these
for the rest of your life and still be challenged.
You could also mix the first one with the other patterns
like this:
---------------------------------------------------------
---------------------------------------------------------
-------4-1-2-3--5----------------------------------------
-----3------------4--------------------------------------
---2----------------2------------------------------------
-1--------------------1-2-3-4--etc----------------------- 
that will help you with sweep picking and mixing it with
single note runs.
You can also mix up these: