Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
Q:1/4=200
M:4/4
K:G
['GE D2 DE G2 GA BGBd', '', 'dcBA GFGA B2 G2']  
X:1
L:1/8
Q:1/4=200
M:4/4
K:G
|: GE | D2 DE G2 GA | BGBd cBAG | FGFE DEFG | AFdF E2 GE | D2 DE G2 GA | BGBd efge | dcBA GFGA | 
 B2 G2 G2 :| d2 |: g2 g2 gbag | f2 f2 fagf | edef gfed | B2 e2 e2 ge | dBGB d3 d |1 edef g2 fe | 
 dcBA GFGA | B2 G2 G2 d2 :|2 edef agfe | dcBA GFGA | B2 G2 G2 |]  