Produce music compositions abiding by the stipulated structure and the presented musical idea.
X:1
L:1/8
M:4/4
K:D
['A3 F ABdc B3 A B2 de', 'fa a2 bafe'  
X:1
L:1/8
M:4/4
K:D
|: dB | A3 F ABdc | B3 A B2 de | fafe d2 BA | FABd efdB | A3 F ABdc | B3 A B2 de | faba f2 ed | 
 BA (3Bcd e2 :: de | fa a2 bafe | faaf d3 e | fa a2 bafe | dBBA B2 de | fa a2 bafe | faba f2 ed | 
 BA (3Bcd efed | BA (3Bcd ef :|  