Generate a piece of music. The title is Gua difeng. It belongs to the genre of Xiaodiao. It is from Asia, China,Gansu. Its meter type is simple duple.  
X:1
T:Gua difeng
T:Gua difeng
L:1/8
M:2/4
I:linebreak $
K:Ab
V:1 treble nm="Voice" snm="V"
V:1
 ee ce | f2 af | e2 e2 | ce ec | Bc e2 | ec BA | B4 | ec e2 | ec BA | F2 AB | c B2 c | F2 AB | %12
 c B2 c | AB AF | E4 || %15  