Produce music compositions abiding by the stipulated structure and the presented musical idea.
X:1
L:1/8
Q:1/8=420
M:4/4
K:F
['', 'ag f2', 'df dc', 'a2 ga gf dc de fd ec'  
X:1
L:1/8
Q:1/8=420
M:4/4
K:F
 c2 |: [dd]2 df dc df | g2 ga gf dg | z f g2 df gd |1 ag f2 d2 c2 :|2 ag f2 d4 |: ga z2 ag fe | 
 de fa gf ec | d[d'a] z d [d'a]2 d_e | ec' z d' c'a g2 | ga z2 ag fe | de fa gf dc | 
 [dd]2 df dc de | fd ec d4 :: df dc Ac de | f2 g_a =ac' a2 | ga gf dc de | fd ec d4 :|  