Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:4/4
K:G
['', 'BA GABd dBde gage dega bage', 'G2 GF G2']  
X:1
L:1/8
M:4/4
K:G
 BA |: GABd dBde | gage dega | bage dBGB | BAAG A2 BA | GABd dBde | gage dega | bage dBAB |1 
 G2 GF G2 BA :|2 G2 GF G2 FG |: add^c d2 ga | beed e2 ga | bgaf gedB | BAAG AcBA | GABd dBde | 
 gage dega | bage dBAB |1 G2 GF G2 FG :|2 G2 GF G2 BA ||  