Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
['B2 d', 'B2 d d2 B']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
"^Moderate" dS | d2 B B2 d | c2 A A2 c | B2 d dcB | B3{cB} A2 d | d2 B B2 d | c2 A A2 c | 
 B>cd cBA | G3 G2 :: !fermata!B | B2 d d2 B | A2 c !fermata!c2 A | B2 d d2 B | ABc B2 A | 
 B2 d d2 B | A2 c c2 A | Bdg fef | gdc"^D.C. al segno" Bde |]  