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:6/8
K:G
['dB/c/d ABc', 'd2 e', 'd2 A']  
X:1
L:1/8
M:6/8
K:G
|: dB/c/d ABc | d2 A AGE | dB/c/d ABc | def g3 | dB/c/d ABc | d2 A AGE | GAG D3 | c3 ABc :: 
 d2 e fed | ecA AcA | d2 e g/f/ed | f3 gfe | d2 e fed | ecA AGE | D3 D3 | c3 ABc :: d2 A c2 A | 
 d2 A ABc | d2 A c2 A | def g3 | d2 A c2 A | B2 G A2 F | G3 D3 | c3 ABc :|  