The Castle Wall block that comes
with the EQ software is based on connecting rectangles instead of
squares. I have redrafted it here to use squares. The squares are
not all the same dimension because I drafted them with snap to
grid on, the best way to get everything lined up and connected.
For the same reason, the diamonds on each side of a square are
mirror images of each other.
Click on the image of the block
to download the EQ file.