Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
Q:1/8=360
M:2/2
K:C
['A G2 EG cAGF EDCD EGAc e2', 'ec c2']  
X:1
L:1/8
Q:1/8=360
M:2/2
K:C
 A | G2 EG cAGF | EDCD EGAc | e2 cd AGAc | dfec dcAF | GGAG cGAG | EG G2 EGcd | ecBc (3ABc GE | 
 FEDF ECC :| e | g2 ^fg ec c2 | eg^fg ec c2 | Addc defg | (3agf ge fedf | ec c2 GcEc | 
 AF F2 CFA,F | GABc defg |1 e2 dB cBc :|2 e2 dB c4 |]  