Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:4/4
K:G
['GDB,D GABA GDB,D G2 AB (3cBA BG', 'z2 dgfg edBA GABc d2 ef gd']  
X:1
L:1/8
M:4/4
K:G
 GDB,D GABA | GDB,D G2 AB | (3cBA BG ABAG | (3FGA FE D2 BA | GDB,D GABG | ABcB AGFD | dBcA GFDC | 
 DGGF G2 z2 :| dgfg edBA | GABc d2 ef | gd (3efe dedB | edBG A2 Bc | de (3fga gfed | edgB AcBA | 
 BdcA GFDC | DGGF G2 z2 :|  