--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------  x2
------------------------2-3-2---------------------------------------
-5--0--5--0--3--0--3--0-------3-------------------------------------

--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
----7--5--3--2------2-3-2--------7--5--3--2--------2-3--------------
-5-------------3--3-------3---5--------------3--3-------------------