Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:3/8=110
M:6/8
K:G
['G2 D']  
X:1
L:1/8
Q:3/8=110
M:6/8
K:G
"^*" (3D/E/F/ | G2 D G2 D | GAB cBA | B2 G B2 G | Bcd edc | dcB ABG | FGE D2 c | BGB AFD | 
 G3- G2 |:  