Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/4
M:7/8
K:C
['C D/ E F/E/ D C/']  
X:1
L:1/4
M:7/8
K:C
 C D/ E F/E/ | D C/ E G, | C D/ E F/E/ | D C/ C z/ G,/ | C D/ E F/E/ | D C/ E G, | C D/ E F/E/ | 
 D C/ C z | E/E/F/ A G | E/E/F/ A G | C D/ E F/E/ | D C/ E z | E F/ A G | E F/ A G | C D/ E F/E/ | 
 D C/ C G ||  