I'll try that again.....

+-------------------WWWWWWWWWW----------------+
| TTHHHHTTTTTTTTTDDDSSSSTTTTTTTTTTTTTTT|
|THHHHHHTTTTTTTTDDDSSSSTTTTTTTTTTTTTTT|
|HHHHHH
TTTTT|Internal
WTTHH
TTTTT|wall
WTTTT TTTTT|
WTTTT OOOO|
WFFFF OOOO|
|FFFFF OOOO|
|FFFFF %
/door
%\ %
/
% \ back door %/
% \
|
+-------%%%%%%------------------------------------+