Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/16
M:2/4
K:G
['gaba agfe edcd', 'GBdB dBdB ecec dBdB gedB gedB', 'bagf gfed edef gedB']  
X:1
L:1/16
M:2/4
K:G
|: gaba agfe | edcd edcB | cAAB cAGB | cAAB cAA2 | gaba agfe | edcd ecBA | BGGA BGGA | BGGA BAG2 :: 
 GBdB dBdB | ecec dBdB | gedB gedB | cAAB cAA2 | GBdB dBdB | ecec dBdB | gedB gedB | cAdc BGG2 :: 
 Bdgd gdad | bagf gfed | edef gedB | cAAB cAA2 | Bdgd gfad | bagf gfed | edef gedB | cAdc BGG2 :|  