Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/2
K:Bb
['B2 BF DEFD B2 ABcd B2', 'B2 fB']  
X:1
L:1/8
M:2/2
K:Bb
 d"A" |]"Bb" B2 BF DEFD |"^(Gm)" B2 BG"F7" ABcd |"Bb" B2 BF"^(Gm)" DEFD |"Cm" CccB"F7" ABcd || 
"Bb" B2 BF DEFD |"Gm" B2 BG"F7" ABcd |"Bb" BfdB FDFD |"Cm" CccB"F7" ABcd"B" |"Bb" B2 fB dB f2 | 
"Bb" B2 fB"^(F7)" defb |"Bb" B2 fB dBfB |"Cm" edcB"F7" ABcd ||"Bb" B2 fB dBfd | Bbfe"^(F7)" defg | 
"^(Gm)" fdec"Eb" dBcA |1,3,4"Cm" edcB"F7" ABcd :|2"Cm" edcB"A7" A2 |]  