Develop musical compositions by respecting the prescribed structure and combining the presented musical concept.
X:1
L:1/8
M:4/4
K:D
['AF F2 G3 B', 'df f2'  
X:1
L:1/8
M:4/4
K:D
|: AF F2 G3 B | DF F2 EFGB | df f2 A3 d | (3Bcd ec d3 B | AF F2 G3 B | AD F2 EFGB | dfef df f2 | 
 (3Bcd ec d2 d2 :: df f2 A2 fa | bgaf gfef | df f2 A3 d | (3Bcd ec d3 A | df f2 A3 d | cdef gece | 
 dfef df f2 | (3Bcd ec d2 d2 :|  