Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:2/4
K:Bb
['d/d/ dB (A/B/c/B/) AG G2 (GF) A>A', '.c.d c>A', 'AG G/^F/G F=E/F/ Ac']  
X:1
L:1/8
M:2/4
K:Bb
 d/d/ |:"Bb" dB (A/B/c/B/) |"Eb" AG G2 |"F7" (GF) A>A |"Bb" (GF) Bd/d/ | dB (A/B/c/B/) | 
"Cm" AG e>G |"F7" (F/A/).A (A/c/).c |1"Bb" BB Bd/d/ :|2"Bb" BB B(A/B/) |:[K:F]"F" .c.d c>A | 
"C7" BE E/F/G/A/ | .B.c B>G |"F" AF F/G/A/B/ | .c.d c>A |"Gm" .G.d d/d/d |"F" cA"C7" B/A/G |1 
"F" FA FA/B/ :|2"F" FA FF |:[K:Bb]"Bb" F2 B2 | d2 f2 | B2 d2 |"F7" .c3 f | F2 A2 | c2 f2 | A2 c2 | 
"Bb" d3 B | F2 B2 | d2 f2 | B2 d2 |"Cm" e3 c | G2 c2 |"Bb" F2 B2 |"F7" A2 F2 |1"Bb" BF DF :|2 
"Bb" BF DF/F/ |:"Bb" FB (A/B/c/B/) |"Eb" AG G/^F/G |"F7" F=E/F/ Ac |"Bb" dB B/A/B | FB A/B/c/B/ | 
"Cm" AG G/^F/G |"F7" F=E/F/ Ac |1"Bb" BB BF/F/ :|2"Bb" BB B z |]  