Produce music compositions abiding by the stipulated structure and the presented musical idea.
X:1
L:1/8
Q:1/2=100
M:4/4
K:D
['z2 A2 d2 A2 d>c B2 e4', 'a2 f2'  
X:1
L:1/8
Q:1/2=100
M:4/4
K:D
 z2 | A2 d2 A2 d>c | B2 e4 d2 | B2 e2 e>fe>d | B>b a4 f2 | g>fg>a b>ag>f | g>fe>d c>b a2 | 
 B>dc>e d>fe>g | f2 d2 d2 :: f>g | a2 f2 g>fe>d | c>b a4 f2 | a2 f2 g>fg>a | b2 e2 e>dc>b | 
 a2 f2 g>fe>g | f>ed>f e>dc>b | a2 f>f g>ab>c | e2 d2 d2 :|  