1-----1--------------1-----------3------------3----------4--------4------------3---------------
2-------1----------------------------3------------------------6------------------3---------5-----
3----------------------------------------5------------------------6---------------3---------5----
4------------3---------------------------------------------------------------------3---------5----

1--------------------------------------------------------
2-------------------------------------------------------
3---5---6-------8--6----5---------------------------
4-----------------------------8-------------------------
รู้เรื่องป๊ะเนี่ยท่อน intro นะ