2/5 : slide from 2 to 5 quickly
repet : repeat section twice
||-0--------------0-----0--------0-------0-----2---2------
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||-0-----------0-----------2-------2---0---2-----------2--
||----0--2--4---------------------------------------------
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|------3-----3--------3-----3-------3-------3--------------
|--------------2--------------0---2-------2-------0-----0--
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|----------------------------------------0-------0---------
|---0----------0---0---------0-----0---2-------2---0-------
|-----2---0----------2---2/5-------------------------------
|------------0-------------------0---------0---------------
|--------2---2-------3-----0-------4----------4-----4------
|-1----1-----1--2------2------3------3---3------3-----3----
|----------------------------------------------------------
|----------------------------------------------------------
|----0-----0-------0-----0-------0-----0----0-----0-----0--
|-4------4-------0----0--------0----0--------0----0--------
|--------------------------0-------------0-------------0---
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|-----2---0----------2---2/5-------------------------------
|------------0-------------------0---------0---------------
|--------2---2-------3-----0-------4----------4-----4------
|-1----1-----1--2------2------3------3---3------3-----3----
|----------------------------------------------------------
|----------------------------------------------------------
|----0-----0-------0-----0-------0-----0----0-----0-----0--
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|--------------------------0-------------0-------------0---
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