Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:4/4
K:G
['B2 BG', 'Bc d2 dB e2 ed cB cA']  
X:1
L:1/8
M:4/4
K:G
 B2 BG B2 BG | B2 BG FG Ac | B2 BG cB AG | FD EF GA Bc | B2 BG B2 BG | B2 BG FG Ac | B2 BG cB AG | 
 FD EF GA Bc || d2 dB e2 ed | cB cA d2 dc | B2 BG cB AG | FD EF GA Bc | d2 dB e2 ed | cB cA d2 dc | 
 B2 BG cB AG | FD EF G2 G2 ||  