Block 28

This was another fun block to do.

Here is everything set out and ready to go.  The small stack of blocks at the top of the picture is for 1/2-square triangles.

Here I've done the centre square-in-a-square, the outer triangles, and the 1/2-square triangles have been set out.

Now the centre square-in-a-square becomes the centre for the next square-in-a-square.  Also the squares for the next two borders have been assembled.

Now the first border has been added.  (I love how this centre looks)

And the next border...

And finally the outer triangles to make our next block.