[raapntkb] Five regions in a rectangle

Divide a rectangle into 5 regions.  A bunch of ways to do it:
Rectangle in the middle, remaining region divided orthogonally.
Remaining region divided diagonally.
Remaining region divided like a swastika.
Diamond in the middle.
2x3 grid, merging two blocks, or stretching.
1x5 grid.

Tk square buttons