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
Q:1/2=80
M:2/2
K:Bb
['BFDF BdcB cAFA cedc dbfd', 'B,2 B>ABc B>ABc Bcde f3 d G>FGA', 'c/d/ e>fd c>dB A>GA BGE', 'Adf- fdB Ace- ecA']  
X:1
L:1/8
Q:1/2=80
M:2/2
K:Bb
 BFDF BdcB | cAFA cedc | dbfd egec | dfAc BAGF | BFDF BdcB | cAFA cedc | dbfd g2 fe | 
 dcBA B2 B,2 :: B>ABc B>ABc | Bcde f3 d | G>FGA G>FGA | GABc d3 D | E>DEF E>DEF | EFGA B3 B, | 
 C3 g fdec | B2 FD B,4 :|[M:6/8][K:A][Q:3/8=100] c/d/ | e>fd c>dB | A>GA BGE | E>FE EFG | 
 ABc B2 c/d/ | e>fd c>dB | A>GA BGE | EFE Ecd | cdB A2 :: z | Adf- fdB | Ace- ecA | FGA Bcd | 
 BcA GFE | Adf- fdB | Ace- ecA | Fdf e>fd | c>dB A2 :|  