Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
M:2/4
K:G
['gf ed Bd', 'dB GA Bd ed']  
X:1
L:1/8
M:2/4
K:G
 gf ed | Bd ed | gf ed | Bd A2 | gf ed | Bd ed | gB dB | AG G2 :| dB GA | Bd ed | g/a/g ed | 
 Bd A2 | dB GA | Bd ed | gB dB | AG G2 :|  