Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:6/8
K:G
['GBA G2 B', 'd3 dcd e2 f']  
X:1
L:1/8
M:6/8
K:G
 D | GBA G2 B | def gdB | GBA G2 B | AFD DEF | GBA G2 B | def gfg | ecA GAG | FEF G2 :| B | 
 d3 dcd | e2 f gfe | ded/c/ Bcd | ecA GFE | d3 dcd | e2 f gfg | ecA GAG | FEF G2 :|  