Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
['d2 A', 'd2 d fdf']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
 C |[K:D] .TBe' adA | d2 A F{G}DF | F{G}DF AFD | d2 A FDF | FDF BGE | d2 A FDF FDF AFD | BGB AFA | 
 EDE FAA || d2 d fdf | afd bge | d2 d fdf afd ecA | d2 d fdf | gab g2 f | geg fdf | cBc ecA |]  