arizona - nine patch

Based upon a 3x3 grid

Here is the post by Patchwork Square which gives example layouts

The Quilted Forest has a tutorial on how to make the block

Sunrise Quilt Studio has a more classic colour palette

Incidentially the centre of the block is an irregular shoo fly block with larger block in the centre which gives an example of how any 4x4 block can be expanded with an HST border

More 3x3 blocks