Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
Q:1/8=280
M:4/4
K:G
['AG E2', 'AG E2', "e2 dega/b/ c'2 ba b2 ag ag", 'E2 dBgB eBgB ef/g/ dB AG E2']  
X:1
L:1/8
Q:1/8=280
M:4/4
K:G
 D/E/ | G<GBG AG E2 | GGBG c2 e2 | dBBG AG E2 | DGBA G2 G :|"^2" z | gBdB AG E2 | gBdB gdga/b/ | 
 e{f}gBG AG E2 | DGBA G2 G :|"^3" z | dgbg ag e2 | dega/b/ c'2 ba | b2 ag ag e2 | dgba g2 g :| 
"^4" z | dBgB AG E2 | dBgB eBgB | ef/g/ dB AG E2 | DGBA G2 G :|  