Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
M:2/4
K:G
['GG GG Bd BG']  
X:1
L:1/8
M:2/4
K:G
|:"G" GG GG | Bd BG |"D7" AA AA | FA FD |"G" GG GG | Bd BG |"D7" dc BA/A/ |"G" G2 G2 :|  