play this a few times
-------------------------------]
-------------------------------]
-0-0------------7-7--5-5-5-5--]
-2-2--5-5-5-5-x-7-7--5-5-5-5--]
-2-2--5-5-5-5-x-5-5--3-3-3-3--]
-0-0--3-3-3-3-x---------------]

-------------------------------]
-------------------------------]
-0-0------------7-7--5-5-5-5--]
-2-2--5-5-5-5-x-7-7--5-5-5-5--]
-2-2--5-5-5-5-x-5-5--3-3-3-3--]
-0-0--3-3-3-3-x----------------]

-------------------------------]
-------------------------------]
-0-0------------7-7--5-5-5-5--]
-2-2--5-5-5-5-x-7-7--5-5-5-5--]
-2-2--5-5-5-5-x-5-5--3-3-3-3--]
-0-0--3-3-3-3-x----------------]