Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/4
M:2/2
K:C
['B A F/F/ D B']  
X:1
L:1/4
M:2/2
K:C
 G G D E | F E E G | c c d B | c3 G | e3/2 d/ c B | A F/F/ D B | A F/F/ D B | c3 G | G D D E | 
 F E D G | c c d B | c3 G/G/ | e3/2 d/ c B | A F/F/ D B | A F/F/ D B | c4 ||  