How to create multiple blocks for blog teasers from a single view automatically
If I understand the question correctly - In views, create a new block for each instance of the block you want by clicking on +Add:

You could also create a completely new view, but this keeps things organized.



Where you put in the number of items to display, you can change the offset of the item:



In this way you can set the second block to have an offset of 1, the third 2, and so on. You can then create 4 blocks that each contain one of the most recent 4 items.