---------------------------------------------------------------|
---------------------------------------------------------------|
---------------------------------------------------------------|
---------------6--7--------------------7--6--------------------|
4--------------7--9--0---------2-------9--7--------------------|
4-444-444-44---------0-000-000-2-222---------------------------| repeat twice

------------------------------------------------------|
------------------------------------------------------|
-6---6---4---2---6---6---7---4------------------------|
-7---7---6---4---7---7---9---6------------------------|
------------------------------------------------------|
--000-000-000-000-000-000-000-------------------------| X 2

dont include|------------------------repeat 4 X-------------------------|
-------|----------------------------------------------------------------|
-------|------6-4--------------------------------------------6-4--------|
-------|------7-6-6-7--------------------6-7-----------------7-6-6-7----|
0-----2|----------7-9----4---4---4---4---7-9-0---------2---------7-9----|
0-----2|-------------444-444-444-444-444-----0-000-000-2-222------------|

------------repeat twice--------------------------------------------------|
--------------------------------------------------------------------------|
----------------------------------7--------------------------4------------|
-4-----7----6----6----7-----6-7h9---7--6