Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
Q:1/4=100
M:6/8
K:G
['B3 B3', 'd2 e']  
X:1
L:1/8
Q:1/4=100
M:6/8
K:G
 GAB"^tr" B3 | gdB"^tr" B3 | GAB"^tr" B3 | gfe dcB | GAB"^tr" B3 | gdB B3 | gbd egB | 
 caB"^tr" A3 :: GAc d2 e | dBg dBg | GAB dBg | deB d3 | GAB d2 e | eBg def | gbd egB | def g3 :|  