Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:4/4
K:C
['C>DC>D EG A2 GECD A,4 C>DC>D EGAc', 'c>dcG EG A2']  
X:1
L:1/8
M:4/4
K:C
|: C>DC>D EG A2 | GECD A,4 | C>DC>D EGAc | GECD C4 :: c>dcG EG A2 | cedc d2 g2 | c>dcG EG A2 | 
 GECD C4 :|  