Intro:
-----------------------------------------------4-|
-------------------------------------------5-7---|
---6--------------4-6--6---------------4-6-------|
------4-6-----6-4----------4-6---6-4-6-----------|
----4-----4-6------------4-----4-----------------|
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----------------------      ----                     ---------|
----------------------      ----                     ---------|
---6--------------4-6-      ---- (2nd and 6th) time) -----4-6-|
------4-6-----6-4----- x7   ----                     -6-4-----| (4th time)
----4-----4-6---------      -4-6                     ---------|
----------------------      ----                     ---------|

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--(b9)-7--5--7--(b9)-7--5----|
--(b9)-8--6--8--(b9)-8--6----|
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