Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:2/4
K:G
['gdBG c>A B2 gdBG AF G2 gdBG', 'd4 dcBd ec Tc2 cBAc dB TB2']  
X:1
L:1/8
M:2/4
K:G
|: gdBG | c>A B2 | gdBG | AF G2 | gdBG | FA c2 | Bed^c | d4 :: dcBd | ec Tc2 | cBAc | dB TB2 | 
 BG g2 | dB g2 | ecBA | G4 :|  