Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/4
M:3/4
K:F
['B c2']  
X:1
L:1/4
M:3/4
K:F
 F | F2 G | A2 F | A2 B | c2 c | A2 d | c2 B | A G/F/ G | F2 F | F2 G | A2 F | A2 B | c2 c | A2 d | 
 c2 B | A G/F/ G | F2 F | A2 A | G3/2 A/ B | c2 B | c2 c | c2 c | d2 d | c B/A/ B | A2 A | A2 F | 
 G2 c | d2 d | c3/2 B/A/G/ | F B2 | A G2 | F2 |]  