Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/2=90
M:3/2
K:Bb
['B4 dcBA Bc d2 F2 G2 A2', 'B4 B2 F2 GABA GFED C2 c4', 'B4 B,CDE F2 D2 G2 E2 A2', 'B4 d2 f2 Bcde f2 B2 A2', 'B4 BAGF EDEC B,CDE F2 A4 c4', 'B4 b2 (f_a) gfed edcB ABcd edcB']  
X:1
L:1/8
Q:1/2=90
M:3/2
K:Bb
 B4 dcBA Bc d2 | F2 G2 A2 B2 cd e2 | d2 gf edcB ABcA | F2 B2 ABcA B4 :: B2 F2 GABA GFED | 
 C2 c4 d2 edcB | A2 a2 bagf edcB | F2 B2 ABcA B4 :: B,CDE F2 D2 G2 E2 | A2 F4 GA B2 AB | 
 c2 Bc d2 cd edcB | F2 B2 ABcA B4 :: d2 f2 Bcde f2 B2 | A2 G2 F2 a2 b2 f2 | g2 f2 b2 d2 c2 B2 | 
 F2 B2 ABcA B4 :: BAGF EDEC B,CDE | F2 A4 c4 d2 | e2 d2 cdBc ABGA | F2 B2 ABcA B4 :: 
 b2 (f_a) gfed edcB | ABcd edcB AGFE | DEFD GEAF BGcA | F2 B2 ABcA B4 :|  