Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['A3 cAc']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
|: G3 BAB | A3 cAc | d2 B c2 A | BAG FED | G3 BGB | A3 cAc | dBG cAF | G3 G,3 |:  