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
['G,2 B,D']  
X:1
L:1/8
M:4/4
K:G
 G,2 B,D C2 EC | DCB,D GABG | ADDD dDBD | AcBA GEDB, | G,2 B,D (3CB,CEC | DCB,D G2 AA | 
 cBcd (3e_eedc | BdAd BG G2 | G,2 B,D (3CB,CEC | DCB,D GABG | ADDD dDBD | AcBA GEDB, | 
 G,2 B,D (3CB,CEC | DCB,D G3 AB | cBcd (3e_eedc | BdAd BGGG | gfgd ed B/c/d | eaag fded | 
 fdad gdbd | gbdg bdgb | gfgd (3e_eedB | cBAB cdef | gfgd (3e_eedc | BdAd BGGG | gfgd ed B/c/d | 
 eaag fedg | fdad fdad | gbdg bdgb | gfgd (3e_eedB | cBAB cdef | gfgd (3e_eedc | BdAd BG G2 |]  