Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/4
Q:3/4=110
M:6/4
K:C
['E3/2 F/ G C2 c B3/2 c/', 'G E G A']  
X:1
L:1/4
Q:3/4=110
M:6/4
K:C
 E3/2 F/ G C2 c | B3/2 c/ d G2 c/B/ | c3/2 d/ e A3/2 f/ e | d3 G3 | E3/2 F/ G C2 c | 
 B3/2 c/ d G2 g/f/ | e3/2 f/ g G3/2 c/ B | c3 C3 :: G E G A F A | G E G A F A | G E G A B c | 
 B3 G2 e | d B d e c e | g e g a f a | g e g d e f | e3 c3 :|  