Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
Q:1/2=80
M:2/2
K:G
['B2 AG', 'BGBd BGBd A/A/A Ac B/B/B Bd BG', 'dcBA (G/A/B/c/ d)B A/A/A Ac Bdef']  
X:1
L:1/8
Q:1/2=80
M:2/2
K:G
 G/G/G GA B2 AG | c2 BA dgfg | e2 dc BG g2 |{c} B2 AG FAFD :: G/G/G GA BGBd | BGBd A/A/A Ac | 
 B/B/B Bd BG g2 |{c} B2 AG FAFD :: g2 dB g/f/e/f/ g2 | defg dcBA | (G/A/B/c/ d)B A/A/A Ac | 
 Bdef gefg :|  