Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
Q:3/8=88
M:3/8
K:G
['d2 d cdc']  
X:1
L:1/8
Q:3/8=88
M:3/8
K:G
 d2 d | cdc | B2 c | d2 d | cdc | B3 | c2 c | BAG | F2 G | c2 c | BBA | G3 |]  