Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:4/4
K:G
['cB dB']  
X:1
L:1/8
M:4/4
K:G
"^ABB""^A" DF |"G" G2 GB"D7" D2 (3DEF |"G" GF GA"Em" B2 BG |"C" cB ce"G" dB AG | 
"Am" AB AG E2"D7" (3DEF |"G" G2 GB"D7" D2 (3DEF |"G" GF GA"Em" B2 BG |"Am" cB ce"G" dB GA | 
"D7" Bc BA"G" G2 |:"^B" (3Bcd |"C" e2- eg"G" dB- B2 |"D7" cB cd"G" B GB |"C" cB ce"G" dB AG | 
"A7" AB AG E2"D7" (3DEF |"G" G2 GB"D7" D2 (3DEF |"G" GF GA"Em" B2 BG |"C" cB ce"G" dB GA | 
"D7" Bc BA"G" G2 ||  