Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['BAFA D2 FA BA (3Bcd e2 de', 'fagf egfe', 'BABd e2 de faaf egfe', 'faaf egfe']  
X:1
L:1/8
M:4/4
K:D
 | FA | BAFA D2 FA | BA (3Bcd e2 de | fagf egfe | dfed B2 dB | BAFA D2 FA | BA (3Bcd e2 de | 
 fagf egfe | d2 f2 d2 :: fg | afdf a2 g2 | efga b2 ag | fagf egfe | df ed B2 dB | BAFA D2 FA | 
 BA (3Bcd e2 de | fagf egfe | d2 f2 d2 :|[K:D] | A (3EFA | BAFA DEFA | BABd e2 de | faaf egfe | 
 defd B2 dc | BAFA DAFA | BABd e2 de | faaf egfe | d2 d2 d2 :: fg | afdf a2 gf | gfga b2 ag | 
 faaf egfe | defd Bcdc | BAFA DEFA | BABd e2 de | faaf egfe | d2 d2 d2 :|  