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:G
['GABc dBGB', 'G2 GggG FffF EeeE DddD EeFf GgAa']  
X:1
L:1/8
M:2/2
K:G
 GABc dBGB | ecAc dBA<G | GABc dBGB | cAGF G2 G2 :| GggG FffF | EeeE DddD | EeFf GgAa | agfe d3 d | 
 Ecce egge | dBBd dggd | eccA dBBG | cAAF G2 G2 ||  