Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:1/8=160
M:6/8
K:G
['AGE DB,D EDB, G,B,D', 'G2 A BAB dBG cAB cdc BAB']  
X:1
L:1/8
Q:1/8=160
M:6/8
K:G
 A | BAB AGE | DB,D EDB, | G,B,D GBd | edB AGA | B3 AGE | DB,D EDB, | G,B,D EDE | F3 G2 :| A | 
 BAB dBG | cAB cdc | BAB dBd | edB AGA | B3 AGE | DB,D EDB, | G,B,D EDE | F3 G2 :|  