Today’s pattern I called “Tire tread”. (Again, this naming thing is not my biggest strength). It works up to 60″ x 60″ if made as shown.
This pattern is very easy–In the picture above there are 3.5″ unfinished squares and half square triangle blocks. If you don’t use a scrappy (black) background, you can also fill in with some 6.5″ unfinished squares instead of making four squares as in the picture.
There is a half square triangle tutorial here, use method 2 and cut your original squares to 4″.