Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
Q:1/4=100
M:2/2
K:G
['G/G/G BG', 'c2 GE', 'G/G/G BG', 'c2 Ec Ec GE']  
X:1
L:1/8
Q:1/4=100
M:2/2
K:G
 G/G/G BG c2 GE | G/G/G BG A2 FD | G/G/G BG cA BG | A/B/c B/c/d A2 FD :: c2 GE Ec GE | c2 GE DAFD | 
 c2 GE Ec GE | A/B/c/A/ B/c/d/B/ A2 FD :: G/G/G BG cA BG | G/G/G BG ADFD | G/G/G BG cA BG | 
 A/B/c/A/ B/c/d/B/ A2 FD :: c2 Ec Ec GE | c2 E/c/B/c/ DA FE/D/ | c2 Ec Ec GE | 
 A/B/c/A/ B/c/d/B/ A2 FD :|  