--------------------------------------------------------------------------|
-----1---3---5-3------5---8---5-------------------------------------------|
-2-2---2---2------5-5---5---5---5- ----4---7---9-7------2---5---2---------|
-----------------------------------5-5---5---5------3-3---3---3-----------|x2
--------------------------------------------------------------------------|
--------------------------------------------------------------------------|



------------------------------|
------------------------------|
------------------------------|
-7-7-7-7-5-10-7-7-7-7-5-------|x4
------------------------7-----|
------------------------------|



------------------------------|
------------------------------|
---9---5----------------------|
-7---7---7-8-7-5-8-7----------|x3
------------------------------|
------------------------------|


------------------------------|
------------------------------|
------------------------------|
---9---5----------------------|x1
-7---7---7-8------------------|
------------------------------|
then back to start.