Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:2/4
K:G
['GF D^C D2']  
X:1
L:1/8
M:2/4
K:G
 A | GF DE | FG AF | GF D^C | D2 z | A | cB AA | d/ d3/2 GA | BB cB | A2 z | A/B/ | cB AA | 
 d G2 G/A/ | BG cB | A2 z | G | GA DE | F3/2 G/ A3/2 F/ | GF D^C | D2 z ||  