Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:2/4
K:E
['E/F/G/A/ BG', 'e>f ec f>f fd']  
X:1
L:1/8
M:2/4
K:E
 E/F/G/A/ BG | eG BG | E/F/G/A/ BG | eF F/A/G/F/ | E/F/G/A/ BG | eG BG | AF/A/ B/c/B/A/ | GE E2 :: 
 e>f ec | f>f fd | e>e ec | fc cd | e>f ec | f>f fd | eB cB/A/ | GE E2 :|  