Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['DGBG dGBF G2 BG cAFA DGBG', 'BGAF gfga gbag fdfg afdf g2 fa']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 DGBG dGBF | G2 BG cAFA | DGBG dGGe | fdcA BGFE | DGBG dGBF | G2 BG cAFA | DGBG dGBd | ceAc BGAF || 
 gfga gbag | fdfg afdf | g2 fa gbag | fdcA BGAf | g2 gf gbag | fed^c dfag | bagf gbag | 
 fd (3cBA BGAF | G8 |]  