Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/4
M:4/4
K:C
['E F']  
X:1
L:1/4
M:4/4
K:C
 G2 E F | G2 z2 | E F G F | E D C2 | E F G F | E D C2 | E2 D D | C4 |]  