x-------------------------------------------------------------------|
-------------------------------------------------------------------|
-------------------------------------------------------------------|
-------------------------------------------------------------------|
-----6-----6---6-----6-----6---6-----6-----6---6-----6-----7-------|
-4-4---4-4---4---0-0---0-0---0---4-4---4-4---4---0-0---5-5---------| X2
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
-------------------------------------------------------------------|
-------------------------------------------------------------------|
-------------------------------------------------------------------|
-------------------------------------------------------------------| X2
-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-6-7-7-7-7---|
-4-4-4-4-4-4-4-4-0-0-0-0-0-0-0-0-4-4-4-4-4-4-4-4-0-0-0-0-5-5-5-5---|
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
-------------------------------------------------|
-------------------------------------------------|
-------------------------------------------------|
-------------------------------------------------|
-6-6-6-6-6-6-6-6-6-6-6-6-7-7-7-7-7-7-6-6-6-6-6-6-| X2
-4-4-4-4-4-4-0-0-0-0-0-0-5-5-5-5-5-5-4-4-4-4-4-4-|
x x x x x x x x x x x x x x x x x x x x
---------------------------------------------------------|
---------------------------------------------------------|
---------------------------------------------------------|
---------------------------------------------------------|
-6--6-6-6--6--6--6-6-6--7--7-7-7--7-6--6-6-6-------------| X2
-4--4-4-4--4--0--0-0-0--5--5-5-5--5-4--4-4-4-------------|
x x x x x x
now repeat the first part and your done.
