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
['dB B2', 'GABc d3 e dGBd cBcd e3 f', 'dB B2', 'dB B2']  
X:1
L:1/8
M:4/4
K:G
 dB B2 dGBd | cBcd e2 ge | dB B2 dGBG | A2 FA DAFA | dB B2 dGBd | cBcd efge | dGBd gdBG | 
 FGAF GABc || d3 e dGBd | cBcd e3 f | g2 gf gdBG | A3 F DFAd | BG G2 DGBd | cGGG EGce | dGBd gdBG | 
 FGAF GABc || dB B2 dBgB | aged efge | dB B2 dBGB | cABG ABce | dB B2 dBgB | agef g3 e | 
 dG (3Bcd gdBG | FGAF G2 Bc || dB B2 dBgB | aged efge | dB B2 DGBd | cAA^G ABce | dB B2 dBgB | 
 agef g3 e | dG (3Bcd gdBG | FGAF G2 Bc ||  