Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/16
Q:1/8=80
M:3/8
K:G
['GE D2E2 GA B2B2 AG EF G2G2', 'd4 de g2g2 ed e2g2 ed e2B2']  
X:1
L:1/16
Q:1/8=80
M:3/8
K:G
"^slow" GE | D2E2 GA | B2B2 AG | EF G2G2 | A2G2 ED | EF G2A2 | B2g2 (3fed | e4 de | d4 || de | 
 g2g2 ed | e2g2 ed | e2B2 AG | GE !fermata!D2 (3G2B2d2 | e4 dc | BA B2 AG | E2B2 AG | G6 |]  