How do I create diagonal checher like shape

Question

I want to create a diagonal checker grid like this

but all I could do with arrray modifire and some tinkering is this:

I need as clean topology as possible, how can model it in blender?

Answer 1

Not sure to understand, but something like this?

where the base object (in red square) is Z-rotated 45° and rotation applied.

Answer 2

m.arditos way Is legit, but You can also do it like this: