Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/4
M:3/4
K:C
['G E']  
X:1
L:1/4
M:3/4
K:C
 (E/D/) | C B, C | c B c | A G A | G E D | C B, C | (c B) c | A3 | G2 (A/B/) | c c c | c G E | 
 F G A | G2 E/F/ | G E C | (G E) C | D3 | C2 ||  